Eukaryotes frequently have several cells, but prokaryotes are invariably unicellular. Eukaryotic cells are also between 100 to 10,000 times bigger and more complicated than prokaryotic cells.
The most common infectious cause of blindness in the world is trachoma. Chlamydia trachomatis, an obligatory intracellular bacteria, is the culprit. Direct skin-to-skin contact, such as shaking hands, grappling, or other skin contact, is how MRSA is transmitted. The most common avoidable cause of blindness in the world is trachoma. 85% of those with active illness live in deprived parts of Africa, where trachoma occurrences are most common. Trachoma infection rates among children under 5 might reach 60% or higher in regions where the disease is widespread. Trachoma problems may be avoided with early treatment. Cataract. The most common cause of blindness globally and of vision loss in the United States is cataract, which is a clouding of the eye's lens.
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Suppose you view a slide under the low-power lens of a microscope. You are able to focus the object, and increase the lens magnification. However, you have trouble focusing the image in the high-power lens. What action is most likely to resolve the issue? O Return to the low-power magnification, refocus on the object, then return to the high-power lens. O Take the slide off the stage and clean the lenses with lens paper. O Use the coarse adjustment knob to try to focus on the object. O Try a different slideOnly the coarse adjustment knob should be used when viewing an image with the high-power lens. O True O FalseIf a specimen is in liquid, how should you mount it onto a slide? O Remove the sample from the liquid and place it on a dry slide. O Put a drop of water on the slide, remove the sample from its liquid and place it in the water on the slide O Place a drop of the sample in its liquid on the slide O Put as much of the sample in its liquid on the slide as you can
A. Return to the low-power magnification, refocus on the object, then return to the high-power lens is most likely to resolve the issue.
This is helpful because you only need to use the fine adjustment on the high-power lens to see the object clearly once it is clear under low power.
Even though using lens-cleaning paper to clean the lens should help, getting the right focus at low power is important, so the second option is not the right choice. Because you typically use the Fine adjustment with high-power lenses and the coarse adjustment with low-power lenses, the third option is incorrect. The final choice would also be wrong because if you can focus with a low-power lens, there is nothing wrong with the slide.
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can be defined as the time-dependent physical and physiological changes in body structure and function that occur normally and progressively throughout adulthood as humans mature and become older. One view of aging describes it as a process of slow cell death, beginning soon after fertilization.aging
Aging is a complex process that can be seen from a variety of perspectives. On a physical level, aging is associated with changes in the body's structure and functions, including declines in strength, mobility, and coordination. Psychological effects of aging include changes in memory, attention, and decision-making.
Socially, aging is associated with changes in roles, relationships, and social status. Lastly, aging is a spiritual process, as it is often accompanied by changes in attitudes, values, and beliefs.
Step 1: In the early stages of life, aging begins as soon as fertilization occurs and cells start to divide. This process is known as cellular senescence. As cells divide, they become less efficient at performing certain functions and eventually stop dividing altogether.
Step 2: As the years pass, different body systems begin to show signs of aging. The skin becomes thinner and wrinkles begin to form. The bones become less dense and more brittle, leading to an increased risk of fractures. The cardiovascular system begins to weaken, leading to a decrease in blood and oxygen flow to the body’s tissues.
Step 3: As the body continues to age, the immune system begins to weaken and the body becomes more susceptible to disease and infection. The body’s metabolism slows down, leading to an increase in fat storage and a decrease in muscle mass. The digestive system also slows down, resulting in constipation, indigestion, and other digestive issues.
Step 4: The aging process is also accompanied by cognitive decline. Memory and concentration become more difficult as the brain begins to shrink and the neurons become less efficient. The brain also begins to produce less of the hormones that control mood and energy, which can lead to depression and low.
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Which table best compares the events that occur during different stages of the cell cycle? A Phase. event. S. Phase. DNA replication. M. Phase. Nuclear division. B Phase. Event. S. Phase. Nuclear division. M. Phase. Cytoplasm division. C phase. event. S. Phase. cytoplasm division. M. phase. cell growth. D phase. event. s. phase. cell growth. m. phase. DNA replication.
The table that best compares the events that occur during different stages of the cell cycle is S phase/DNA replication and M phase/Nuclear division. Option A.
Cell cycleThe cell cycle has two main phases which are further divided into subphases. The main phases are:
S phaseM phaseThe S phase is further divided into:
G1 phase: a phase during which the cell grows and developS phase: a phase during which the cell carries out DNA replicationG2 phase: a phase during which the cell synthesizes proteins.The M phase is further divided into:
ProphaseMetaphaseAnaphaseTelophaseCytokinesisIn other words, the M phase is the active cell division phase.
Following the summary of the cell cycle, the table that best compares what happens during the cell cycle can, thus, be seen as the one that pairs DNA replication with the S phase and nuclear division with the M phase.
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Determine the ratio of offspring with the described
trait to the total number of offspring:
Unattached earlobes and cleft chin
Unattached earlobes and no cleft
Attached earlobes and cleft chin
Attached earlobes and no cleft
The ratio of offspring with the described trait to the total number of offspring: unattached earlobes and no cleft. So, the correct option is (B).
What is Trait?A phenotypic trait is defined as a specific form of a phenotypic characteristic of an organism which may be either inherited or environmentally determined, but usually occurs as a combination of both.
A heredity-related trait is a specific characteristic of an individual which may be determined by genes, environmental factors, or a combination of both. These can be qualitative (such as eye color) or quantitative (such as height or blood pressure).
Thus, the ratio of offspring with the described trait to the total number of offspring: unattached earlobes and no cleft. So, the correct option is (B).
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in the general population, 1 in 300 individuals is a carrier for tay-sachs disease, while 1 in 30 individuals of ashkenazi jew descent are carriers. tay-sachs also affects 1 in 30 individuals with french-canadian ancestry, although two completely unique mutations are responsible for the ashkenazi and french-canadian mutations. Part A What are the chances of two individuals having a child with Tay-Sachs if both individuals are not of Ashkenazi or Franch-Canadian descent? Enter your answer using scientific notation. For the multiplication symbol, uso an asterisk 画? .366 10 2 Submit Incorrect; Try Again; 5 attempts remaining Part B what are the chances of two Individuals having a ¢hild with Tay-Sachs lf one Individual Is of Ashkenazi descent and one l$ no Submit My Answars Give Up Part C What are the chances of two individuals having a child with Tay-Sachs if both individuais are of Ashkenazi descent?
Answer: cheeks
Explanation:
balls
Nucleotides in organisms are composed of -
A glucose units in carbohydrate molecules.
B Fat molecules in the cell membrane.
C nitrogenous bases, five-carbon sugars, and phosphate groups.
D ionic bonds, six-carbon sugars, and hydrogen groups.
What fossils 126 outcrop
Answer:
An outcrop is a place where old rock is exposed by wind and water erosion.
The video focuses on the lac operon, but there are others. For example, E. coli also have the trp operon, which has genes that code for enzymes necessary for synthesizing tryptophan, an amino acid necessary for protein synthesis. Like the lac operon, the trp operon has multiple genes under the control of one promoter.
Operons can be either inducible or repressible. Inducible and repressible operons share some characteristics, but they are different in key ways. Can you identify whether the lac and trp operons are inducible or repressible?
Sort each phrase to the appropriate bin.
a). The trp repressor protein is inactive, thus that is the right response. b). The promoter can be bound by RNA polymerase,
A trp operon is a collection of genes that code for the enzymes needed to synthesize the amino acid tryptophan. When tryptophan is present in low concentrations, the trp operon is active; conversely, when tryptophan is present, the trp operon is inactive. This is because it is a repressor protein and attenuation (coupled transcription and translation) controlled mechanism.
When tryptophan is present, the repressor binds to the operator of the DNA sequence, blocking the RNA polymerase's path and ending transcription. When tryptophan is absent, the repressor molecule is inactive and RNA polymerase can promote the transcription of genes after binding to the promoter sequence. Therefore, the right response is "inactive and promoter."
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Adding compost to farmed soil is better than adding synthetic fertilizer because: O compost contains disease fighting microorganisms that synthetic fertilizers lack. O synthetic fertilizers contain a great many microorganisms, some of which spread plant diseases. O compost contains carbon, and using only synthetic fertilizers can lead to a loss of soil carbon content. O synthetic fertilizers are adding the primary chemicals to the atmosphere that contribute to the ozone hole.
Adding compost to farmed soil is better than adding synthetic fertilizers for a variety of reasons. Perhaps the most important of these is that compost contains disease fighting microorganisms that synthetic fertilizers lack.
These microorganisms help to keep the soil healthy and reduce the chances of plant diseases. The microorganisms in synthetic fertilizers, on the other hand, can sometimes spread plant diseases.
Another advantage of adding compost to farmed soil is that it contains carbon. Over time, the use of only synthetic fertilizers can lead to a loss of soil carbon content, which is essential for healthy soil. In contrast, compost adds carbon and helps maintain the soil’s fertility.
Finally, it’s important to consider the environmental impact of synthetic fertilizers. Synthetic fertilizers are adding the primary chemicals to the atmosphere that contribute to the ozone hole. In contrast, compost is a natural product and does not contribute to environmental pollution.
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Pedigree analysis is often used to determine mode of inheritance (dominant or recessive, for example). Be sure to read the "Tips for Pedigree Analysis" in Figure 14.15 in your text. Consider the following pedigree for the trait albinism (lack of skin pigmentation) in three generations of a family. (Solid symbols represent individuals with albinism.) Complete the unlabeled pedigree by indicating the genotypes for all involved.
In one sense, the term “genotype”—like the term “genome”—refers to the entire set of genes in the cells of an organism. In a narrower sense, however, it can refer to different alleles, or variant forms of a gene, for particular traits, or characteristics.
Based only on a pedigree, you might not always be able to ascertain the genotype of a person. An person may occasionally have homozygous dominant or heterozygous alleles for a characteristic. The relationships between a person and their parents, siblings, and children are frequently used to identify genotypes. The phenotypes of the children can be used to identify the unknown genotype. The unknown individual is homozygous dominant if pairing the recessive phenotypic individual with the unknown dominant phenotype (PP or Pp genotype) results in only dominant phenotypes (no recessive).
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Which of the following is NOT a
negative ecological (ecosystem-
related) impact on rangelands
from grazing livestock?
A. the weight of the cattle compacts the soil
B. increased wind and water erosion
C. the livestock eat too much grass
D. the livestock waste fertilizes the grasses
a binding constraint is one for which the cell value is greater than the right-hand side of the value of the constraint.
The statement that mentioned above was false statement. Because a constraint is binding if at the optimum the constraint function holds with. Equality giving a boundary solution, somewhere on the constraint itself, otherwise the constraint is non-binding or slack.
What is a binding constraint in Excel?The dual value expresses the increase in the value of the objective function per unit increase in the value of the variable. A constraint's dual value is nonzero only when the constraint is equal to its bound. This is known as a binding constraint, and its value was determined throughout the optimization process.A constraint function can be translated into a different form that is equal to the original function; that is, the constraint boundary and feasible set for the problem remain unchanged, but the function's form does.Learn more about binding constraint here: brainly.com/question/17053557
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the phylogeny illustrating the domains of life is given. which items below represent current day prokaryotic cells?
The arms industry -members of Congress serving areas affected by the armaments industry Prokaryotes are single-celled creatures that belong to the Bacteria and Archaea domains.
Prokaryotic cells are significantly smaller than eukaryotic cells, lack a nucleus, and are devoid of organelles.
The most evident unfavorable impact of the arms trade on health is loss of life and maiming from the use of weapons in wars. When significant resources are shifted to military expenditure, wealthy countries suffer damage to their health and human services.
It has three legs: political contributions, government permission for military expenditure, lobbying to sustain bureaucracy, and industry oversight; or, more broadly,
the complete network of contracts and movements of money and resources among individuals, businesses, and defense organizations...
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Through the process of photosynthesis, _____energy from the sun is changed to stored _______ energy.
Answer:
Kinetic, Potential
Explanation:
Since light waves are in motion, their energy is the energy of motion. This would be kinetic energy. Once that energy is stored by the plant during photosynthesis, it becomes potential energy.
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis isSpermatogonia>spermatocyte>spermatid>spermsSpermatid>spermatocyte>spermatogonia>spermsSpermatogonia>spermatid>spermatocyte>spermsSpermatocyte>spermatogonia>spermatid>sperms
In a mature human testis, spermatogonia, spermatocytes, spermatids, and sperms should be formed in the proper order during the spermatogenetic process.
Spermatogenesis is the cycle by which haploid spermatozoa are formed. They develop from germ cells. These germ cells develop in the seminiferous tubules of the testis. This cycle begins with the mitotic division of immature microorganisms near the cell layer of the tubules. Thus the primary spermatocyte divides into two haploid daughter cells called secondary spermatocytes. Each secondary spermatocyte now undergoes a second. Each secondary spermatocyte now undergoes a second maturational division that is mitotic. Thus each secondary spermatocyte gives rise to two spermatids that are transformed to form two spermatozoa.
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Select the two true statements about natural selection.
Only variations that help individuals avoid predators can become more
common through natural selection.
The result of natural selection in a population depends on the population's
environment.
Natural selection causes advantageous variations to become more
common over many generations.
Natural selection can cause an individual to gain new advantageous
variations during its life
The result of natural selection in a population depends on the population's environment and Natural selection causes advantageous variations to become more common over many generations are true statements about the process of natural selection (options 2 and 3).
What is the process of natural selection?The process of natural selection is an evolutionary mechanism associated with the differential survival and reproduction of the most adaptive phenotypes in a given environment.
Therefore, with this data, we can see that the process of natural selection leads to a change in gene allele frequency due to differential reproduction.
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Which of the following are advantages to sexual reproductioin? Choose all that apply.
Requires more energy
Variation helps offspring adapt to change
Requires finding a mate
Embryos receive protection
Takes more time
Produces genetically unique offspring
Requires more energy
Answer:
meow meow meow meow, meow meow meow meow, meow meow
Explanation:
meow
2
2² + b² = c²
What is the main benefit of this model?
OA. It shows a pattern for determining the side lengths of a triangle.
OB. It shows the shape and parts of a triangle.
OC. It helps make predictions about the number of sides in a triangle.
OD. It helps visualize the features of a triangle.
Answer: A
Explanation:
a^2+b^2=c^2 is a famous formula known as Pythagorean Theorum.
It can be used to determine a side length of a right triangle based on the length of the other two sides.
A right triangle is a triangle with one angle measuring 90* or having a "right angle."
the process of respiration in root cells can make cations in the soil available for absorption into a root. t/f
It is true to say that the process of respiration in root cells can make cations in the soil available for absorption into a root.
Roots, the underground piece of the plants, ingests air from the air holes spaces tracked down between the dirt particles. Thus, assimilated oxygen through attaches is used to free the energy that later on, is utilized to move salts and minerals from the dirt.
We realize that plants have capacity to blend their own food via photosynthesis process. Photosynthesis happens in those pieces of the plants which contains chlorophyll, the green plant parts. Photosynthesis is obvious to the point that on occasion it appears to cover the respiratory cycle in plants. Breath should not be confused with photosynthesis. Breath happens all as the day progressed, yet the photosynthesis cycle happens in the daytime, within the sight of daylight as it were. Therefore, breath becomes clear at evening time in plants.
This is the explanation we frequently hear individuals caution against dozing under a tree during evening time, as it might prompt suffocation because of overabundance measures of carbon dioxide freed by trees following breath.
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TRUE OR FALSE abel these ftm tubes to demonstrate your understanding of the growth patterns of different organisms based on their metabolic need for or sensitivity to oxygen.
The FTM tubes can be labeled as follow on basis of the growth patterns of different organisms based on their metabolic needs:
1. Aerobic, 2. Microaerophilic, 3. Facultative, 4. Anaerobic
The term "metabolism" refers to the biological process that gives humans the energy they need to survive. People's metabolisms can vary from person to person; for example, some people may have a fast metabolism while others may have a slow one. This genetic and hereditary difference in metabolism.
But physical activity and exercise can momentarily change the metabolism from high to slow and from slow to high. When we exercise regularly, our body automatically uses more energy, changing our slow metabolism to a high metabolism.
The complete question is:
Label these FTM tubes to demonstrate your understanding of the growth patterns of different organisms based on their metabolic need for or sensitivity to oxygen.
Facultative, Aerobic, Microaerophilic, Anaerobic,
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based on the information given in slides 3 and 5 , for what set of cancer genes does p53 act as a transcription factor?
Answer:
Based on the information given in slides 3 and 5, p53 acts as a transcription factor for a set of genes involved in the cell cycle and apoptosis (programmed cell death).
Slide 3 states that p53 is a transcription factor that regulates the cell cycle and apoptosis. Slide 5 mentions that p53 activates the transcription of a set of genes involved in the cell cycle and apoptosis, including cyclin-dependent kinase inhibitor genes (CDKIs) and Bax.
CDKIs are proteins that inhibit the activity of cyclin-dependent kinases (CDKs), which are enzymes that regulate the cell cycle. Bax is a protein that promotes apoptosis.
Therefore, p53 acts as a transcription factor for a set of genes involved in the regulation of the cell cycle and apoptosis, including CDKIs and Bax.
Explanation:
P53 acts as a transcription factor and acts as a guardian of the cell, preventing the cell from getting into the cancer stage, and when the p53 is mutant, then various kinds of cancer are formed.
What is the significance of the p53 ?It is a transcription factor that regulates the expression of cells in the cell cycle and induces DNA repair and apoptosis when the cell is not good enough to go into the cell cycle. Because the loss of functional p53 protein is a common feature of many types of human cancer, it is one of the transcription factors that positively regulate the cell for normal cell division.
Hence, p53 acts as a transcription factor and acts as a guardian of the cell, preventing the cell from getting into the cancer stage, and when the p53 is mutant, then various kinds of cancer are formed.
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In addition to extending the thigh, the biceps femoris rotates the thigh ____ whereas the semimembranosus and semitendinosus rotate the thigh _____
In addition to extending the thigh, the biceps femoris rotates the thigh outwards; whereas the semimembranosus and semitendinosus rotate the thigh inwards.
The biceps femoris rotates the thigh outward (laterally) and the semimembranosus and semitendinosus rotate the thigh inward (medially).
When the biceps femoris contracts, it pulls the femur bone outward and back, resulting in a lateral rotation of the thigh. This outward rotation of the thigh is called external rotation and is commonly seen when executing a squat.
Conversely, when the semimembranosus and semitendinosus contract, they pull the femur bone inward and back, resulting in a medial rotation of the thigh. This inward rotation of the thigh is called internal rotation and is commonly seen when performing a lunge.
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Use extrapolation to determine the environmental salt concentration that is isotonic to the paramecium?
The salt solution concentration is isotonic . More water increases the likelihood that water will enter the Paramecium through osmosis.
The contractile vacuole will need to fill up and then empty out more often if more water enters through osmosis. The paramecium would become overfilled salt solution concentration with water and eventually explode due to the inability of the cell to contain it all. Because the water would collect more quickly in a low salt solution concentration than it would in a high salt solution, it would happen faster if the paramecium was in it.
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What is a major human impact in the Savannah biome? And brainstorm at least 10 different solutions.
Hint: You want to try and think about what you are reading to check if its 2 questions in the question.
Answer #1: The Savanna biome has had a lot of human impacts affect the environment and health of the Savanna. The African people use the Savanna land not just to live on but to graze their cattle and goats. The grasses get completely eaten and with no vegetation, the Savanna turns into a desert.
Answer #2: Humans have affected the savanna biome in many ways. The increased use of the savanna by humans has caused degradation of this biome. Extinction of animals in this biome is caused by humans releasing foreign species into the savanna. Humans have killed predators, built dwellings, and cleared land to be able to farm. Humans have done things like stopping natural fires and starting fires in this environment which kill many plants and animals if they get out of hand.
All living things require energy. Which of the following best explains how cellular respiration and photosynthesis are related, in terms of energy?
The energy transformed in cellular respiration is used to power photosynthesis.
The energy captured in photosynthesis is transformed through cellular respiration.
Photosynthesis and cellular respiration perform the same task in terms of energy transformation.
A Primer on Photosynthesis and the Functioning of Cells Photosynthesis
What is photosynthesis?The process of photosynthesis is the process by which green plants make food.It is the process of converting light energy to chemical energy and storing it in the bonds of sugar.Photosynthesis is energy storing because the process converts light energy into chemical energy, which is stored in the bonds of glucose.In terms of energy, cellular respiration and photosynthesis related in the following sense: The energy captured in photosynthesis is used to power cellular respiration.Photosynthesis is the process whereby green plants synthesize their own food (glucose) using energy from sunlight.Cellular respiration is the process whereby living organisms obtain energy (ATP) by breaking down food molecules in their cells.Photosynthesis produces glucose molecules, which store chemical energy in their bonds. These bonds are broken down via the process of cellular respiration to release the stored energy.
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Which of the following amino acids is more likely to be found on the exterior of a globular protein and which on the interior? Explain.
(a) Valine
(b) Aspartic acid
(c) Phenylalanine
(d) Lysine
Valine is more likely to be found on the exterior of a globular protein because it is a hydrophobic amino acid, meaning it tends to interact with other non-polar molecules and be repelled by water.
Exploring the Differences Between Interior and Exterior Amino Acids in Globular ProteinsValine tends to interact with other non-polar molecules and be repelled by water. Aspartic acid is more likely to be found on the interior of a globular protein because it is a polar amino acid and therefore more likely to interact with other polar molecules and be attracted to water. Phenylalanine and lysine are both polar amino acids and are therefore more likely to be found on the interior of a globular protein.Learn more about amino acids: https://brainly.com/question/2526971
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In a female, the labia minora are two outer, hair-covered folds of skin that enclose the delicate, hair-free folds called the labia majora.
False. In a female, the labia minora are thin textured and smaller in size than the labia majora.
In female reproductive system there are labia which are folds of skin that form the vulva on the outside of the vagina. The labia consist of the labia majora and labia minora. The labia majora are elongated on both sides of the vulva. The middle part forms the pudendal slit and the outer part, is thick and fatty in texture and has fine hairs.
Labia minora are thin textured and smaller in size. Labia minora are located inside the lips of the vagina, precisely in the labia majora and surround the vaginal opening and urethra. The labia minora serve as a protective covering for the clirotis, urethra, and vagina.
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A few unidentified seeds were found in a sealed clay jar during an archaeological dig. Radiocarbon dating showed that the seeds were 725 years old. When the seeds were planted, plants grew from them. Based on cell theory, what statements can confidently be made regarding these unidentified plants and seeds?Living cells inside the seeds divide to generate the new plant cells. Tissues in both the plants and the seeds are made of cells.
When the seeds were planted, plants grew from them this indicates that new plant cells are produced when the living cells inside the seeds divide.
The widely accepted scientific theory known as "cell theory" asserts that all living species are composed of cells, that these cells are the fundamental organizational and structural unit of all species, and that all cells are derived from previously existing cells.
In the given scenario, it is abundantly clear that cells makeup both the seeds and the mature plant. In order to produce the new cells of the plants, the living cells that are contained within the seeds multiply.
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Much of the coordination of vertebrate body functions via chemical signals is accomplished by the _____.Choose matching definitiona. connective tissueb. less surface area per unit volumec. more branching or foldsd. endocrine system
The correct answer is endocrine system.connective tissueb. less surface area per unit volumec.
A intricate system of glands and organs makes up the endocrine system. Your body's metabolism, energy level, reproduction, growth and development, and reaction to injury, stress, and mood are all regulated and coordinated by hormones. The endocrine system is made up of the following components: Hypothalamus. The endocrine system is made up of several glands. Your brain contains the hypothalamus, pituitary, and pineal glands. Your neck contains the parathyroid and thyroid glands. The pancreas is located beneath your stomach, the adrenals are on top of your kidneys, and the thymus is situated between your lungs.
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A specimen
is viewed under a x400 magnification.
The magnified image is 10.5 mm wide.
What is the actual width of the specimen?
Give your answer in microns (μm) and to
2 significant figures.
Enter a numbers
The actual width of the specimen would be 26 μm..
Microscope's magnificationA microscope multiplies the size of images so that the small details that cannot be seen with ordinary eyes are magnified for further study.
Thus, if a microscope magnifies an object whose original size is A by X times, the magnification of the object would be calculated as:
Magnification = AX
In other words, the actual size of the object can be determined by dividing it by the number of times the microscope magnified it.
In this case, the microscope magnified the specimen by 400. The magnified width of the specimen is 10.5 mm. Thus, the actual width of the object can be calculated as:
10.5/400 = 0.02625 mm.
In order to give the answer in microns, recall that:
1 mm = 1000 μm
Thus:
0.02625 mm = 0.02625 x 1000
= 26.25 μm
To 2 significant figures, the actual width of the specimen would be 26 μm.
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