Even with a lawn infested with crabgrass, one should keep mowing properly, since as the saying goes, one year's seeding produces seven years weeding.
What is Weeding?This is referred to as a step which is done when preparing land for different forms of agricultural activities and it involves the process of removing unwanted plants from a field so as to reduce competition for light and nutrients.
It is always best to mow properly because it helps to keep a lawn tidy and reduces the risk of being infested by very dangerous animals such as snakes etc.
This is also because one year's seeding produces about seven years weeding and when this occurs more time, energy and money is spent in other to get ride of them thereby making it the correct choice.
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38. State the amount of digestion (in mm) that might
be expected after 48 hours in a test tube that is
identical to the other 5 test tubes, but at a tem-
perature of 15°C.
(1) less than 2.5 mm
(2) between 2.5 and 4 mm
(3) between 4.0 and 7.5 mm
(4) more than 7.5 mm
The amount of digestion (in mm) that might be expected after 48 hours in a test tube that is identical to the other 5 test tubes, but at a temperature of 15°C is between 2.5 and 4 mm.
Option 2 is correct.
What is temperature?Temperature is described as a physical quantity that expresses quantitatively the perceptions of hotness and coldness which is measured with a thermometer.
The normal rate of digestion after eating takes about six to eight hours for food to pass through your stomach and small intestine.
When the food then enters your large intestine (colon) for further digestion, absorption of water and, finally, elimination of undigested food. It takes about roughly 36 hours for food to move through the entire colon.
To calculate the digestion time, which given as the ratio between number of prey in stomach and total number of prey eaten, times the incubation time, assuming that the feeding intensity is constant.
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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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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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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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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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What TWO FACTORS cause the amount of water collected to vary?
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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the sahara desert and the negev desert belong to the same ______ . group of answer choices a. community b. savanna ecosystem c. biome d. temperate grassland
The Sahara and Negev deserts are both parts of the same ecosystem(biome).
Latitude has no effect on an ecosystem, but it does on a biome. All creatures participate in trophic interactions within food webs and chains in an ecosystem, however this is not always the case in a biome. Aquatic, grassland, forest, desert, and tundra biomes are the five main kinds, while some of these can be further broken down into more specialized groups, such as freshwater, marine, savanna, tropical rainforest, moderate rainforest, & taiga. Scientists may define a biome by defining the temperature range, soil type, quantity of light, and water that are peculiar to a location and create niches for particular species.
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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.
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.
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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HELP I DONT HAVE MUCH TIME
In photosynthesis, light energy is harvested and used to generate
molecules of _____, which contain high amounts of chemical energy.
Select one:
Carbon dioxide
NADP+
Glucose
Oxygen
Using water and carbon dioxide, glucose is produced during photosynthesis by converting solar energy into chemical energy.
Explain about the photosynthesis?Chemical energy is produced during photosynthesis from solar or radiant energy. The rate of photosynthesis is intimately correlated with the productivity of agricultural crops. For all living things, it supplies oxygen to the atmosphere. The ecosystem's oxygen and carbon dioxide levels are kept in check by it.
The process of creating sugars and starches from carbon dioxide and water, which are the building blocks of photosynthesis, stores some of this chemical energy.
The most well-known examples are plants, since all species—aside from a very small number of parasitic or mycoheterotrophic ones—contain chlorophyll and make their own sustenance. The other important group of eukaryotic photosynthetic creatures is algae.
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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 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
8. How does upwelling affect the ocean ecosystem?
a. It increases the albedo of the ocean surface.
b. It brings nutrients from the ocean floor into the
surface currents.
c. It causes energy transfer that results in El
Niño/La Niña events.
d. It brings infrared radiation from the ocean floor
up to the ocean surface.
e. It brings ultraviolet radiation from the ocean
floor up to the ocean surface.
*THIS IS CLIMATE CHANGE*
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.
Based on the data in the table, if the number of snakes were to suddenly decrease, which of the following changes would most likely occur in the food web of this ecosystem?A: increase in number of shrews, decrease in number of hawksB: increase in number of hawks, decrease in number of shrewsC: increase in number of grasshoppers, decrease in number of plantsD: increase in number of spiders, decrease in number of plantsA: increase in number of shrews, decrease in number of hawks (Snakes feed on shrews so with less snakes, the population of shrews should increase. Hawks feed on snakes so with less overall food, the population of hawks should decrease.)
When a population in a trophic web is affected by any factor that reduces or increases its population size, the anterior and posterior links in the trophic chain are affected as well. Option A is correct. increase in number of shrews, decrease in number of hawks.
What is the throphic web?The trophic web is the interaction between different organisms involving transference of energy when some of them feed on the other ones. The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
Because it is a web, all organisms are in equilibrium until a change occurs. When a sudden change affects any of the involved links, there can be a cascade effect on the web.
Any change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
In the exposed example, if snake's population was to suddenly decrease, there would be
a decrease in hawk's populationan increase in shrew's populationSnakes feed on shrews, so a decrease in the number of snakes will allow the shrew's survival and reproductive rate to increase, and hence, to increase their population size.
Hawks feed on snakes and shrews. A decrease in the number of snakes means less available food items for them and more competition. Their population size might be reduced even if the shrew's population increases in size.
Option A is correct. increase in number of shrews, decrease in number of hawks.
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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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Recombination frequencies can be easily calculated by adding the
number of offspring that are different from the parents, then dividing by
the total number of offspring. Let's say you are studying fruit flies and
you cross a wild type, grey female with a vestigial, black male. The F1
offspring are as follows: 650 wild type/grey, 595 vestigial/black, 107
wild type/black, and 91 vestigial/grey. What is the recombination
frequency between the genes for wing type and body color?
The recombination frequency between the genes for wing type and body color is 0.10.
What is genes?Genes are sections of DNA that contain the instructions for the production of proteins and other molecules that are essential for the functioning of living organisms. Genes are the basic units of heredity, and are passed down from parent to offspring through gametes. They are made up of DNA, which is a long molecule made up of four different building blocks known as nucleotides. Genes are responsible for determining the characteristics and traits of an organism, such as eye color, hair color, and even intelligence. Genes are also responsible for the expression of proteins, which are the molecules that carry out the instructions of the genes.
This is because there are a total of 1,443 offspring and 108 of them are different from the parents (107 wild type/black and 91 vestigial/grey).
The recombination frequency is calculated by taking the number of different offspring (108) and dividing by the total number of offspring (1,443), which gives 0.10.
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What fossils 126 outcrop
Answer:
An outcrop is a place where old rock is exposed by wind and water erosion.
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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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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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 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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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 study of the human ecological footprint conducted by the World Wildlife Fund in 2008 shows that ________.
a. we have already exceeded the planet's biocapacity per person
b. we are far below the planet's biocapacity per person
c. the human population will soon crash
d. Earth can sustain a population about double the current population
A study of the human ecological footprint conducted by the World Wildlife Fund in 2008 shows that we have already exceeded the planet's biocapacity per person. The correct answer is choice a.
According to the 2008 Human Ecological Footprint study conducted by the World Wildlife Fund, we have already exceeded the Earth's biocapacity per person.
This means that humanity is consuming more resources than the earth can sustainably provide, leading to environmental degradation and climate change. Adopting more sustainable practices and policies by individuals, communities and governments is critical to ensuring sustainable sustainability.
Earth's biocapacity is the ability of Earth's ecosystems to produce resources and absorb waste and emissions. If humanity's ecological footprint is greater than the Earth's biocapacity, it means that we are using more resources than the planet can sustainably provide, leading to environmental degradation and climate change.
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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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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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Targeting the ALK–CDK9-Tyr19 kinase cascade sensitizes ovarian and breast tumors to PARP inhibition via destabilization of the P-TEFb complex
Targeting the ALK-CDK9-Tyr19 ovarian and breast tumors to PARP inhibition via destabilization of the P-TEFb complex will give HR-deficient ovarian cancers that are sensitive to both PARP inhibitors and platinum compounds.
Numerous PARP inhibitors have been effective in the management of platinum-sensitive ovarian malignancies, indicating a close relationship between sensitivity to platinum-based chemotherapy and response to PARP inhibitors. We looked at the cytotoxic effects of both a platinum drug (cisplatin) and a PARP inhibitor (talazoparib) in BRCA-wild-type (WT) ovarian cancer cells because resistance to platinum-based chemotherapy is a significant predictor of resistance to PARP inhibitors35.
Cells' sensitivity to PARP inhibitors did, in fact, closely resemble that of the platinum molecule. We separated those cells into two groups based on the aforementioned findings: PARP inhibitor/platinum-sensitive and PARP inhibitor/platinum-resistant.
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