Answer:
this is because they appear dead outside and alive inside beings
18. Pepsin is an enzyme produced by stomach cells
to help digest protein. Stomach cells package
and secrete pepsin in which of the organelles
Answer:
Golgi bodies /apparatus
Explanation:
this organelles are responsible in for packaging and transportation of glyco proteins therefore are the organelles mainly involved in secretion of synthesised proteins
Pepsin is an enzyme produced by stomach cells to help digest protein. Stomach cells package and secrete pepsin Golgi bodies.
What are Golgi bodies?The majority of eukaryotic cells contain the Golgi apparatus, sometimes referred to as the Golgi complex, Golgi body, or just the Golgi.
It packs proteins into membrane-bound vesicles inside the cell before the vesicles are delivered to their destination. It is a component of the endomembrane system in the cytoplasm.
It is situated close to the cell nucleus and the endoplasmic reticulum in the cytoplasm.
Pepsin is an enzyme that the stomach cells manufacture to aid in the breakdown of protein. Pepsin Golgi bodies are packaged and secreted by stomach cells.
Thus, the organelle is Golgi bodies.
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Vanessa attempts to freeze liquid mercury. Which statements describe particle arrangement and motion that occur in mercury?
Answer:
Volume of mercury decreases due to close arrangement of particles.
Explanation:
When we freeze liquid mercury, its volume decreases and density increases from from 13.69 g/cm3 to 14.184 g/cm3 and form a solid mercury. The motion of particles stop when we freezes liquid mercury and the particles settles into a stable arrangement. If we cool the liquid mercury and the temperature reaches to -38.83 °C, then it converts from liquid into solid substance.
Which of the following is composed of a population of a species plus populations of other species? A. Community B. Biotic Potential C. Abiotic community D. Ecosystem
A Community is composed of a population of a species plus populations of other species. Thus, the correct option is A.
What is Population?A Population may be defined as a group of individuals belonging to the same species living in the same area at a given time. Some demographic characteristics of a population are size, density, birth rate, death rate, population dispersal, etc.
A community may be defined as a group of individuals belonging to different species living in the same area at a given time.
An ecosystem may be defined as a place or area where individuals of different species along with abiotic factors live together and interact with one another for the purpose of food, shelter, and space.
The Abiotic community deals with the existence of abiotic factors like temperature, rainfall, fire, winds, mountains, hills, etc.
Therefore, a Community is composed of a population of a species plus populations of other species. Thus, the correct option is A.
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is a carbon atom alive?
Answer:
No
Explanation:
Like I said before in a question similar to this one no it is not alive. Although, Carbon is found in all living things and they move constantly through living organisms, the oceans, the atmosphere, and the Earth’s crust in what is known as the carbon cycle it does not consist of all 7 characteristics that are needed to be considered an organism. For example reproduction and response to stimulus...... it does neither
The following question has two parts. First, answer Part A. Then, answer Part B.Caused by a mutation, sickle cell anemia is a disorder that affects hemoglobin, the red blood cell molecule that carries oxygen to cells throughout the body. The β chain of the hemoglobin protein is a single chain of amino acids and is 147 amino acids long. In humans, the gene that encodes for the β chain is located on chromosome 11. The diagrams show the DNA, RNA, and amino acid sequence of an unaffected person and a person with sickle cell anemia.image f8707eaefc0147c9bd074a15bb19c344Part A:Where does the mutation that causes this disorder occur?AThe mutation occurs on the DNA.BThe mutation occurs on the RNA.CThe mutation occurs on the ribosomes.DThe mutation occurs on the amino acid.Part B:Which BEST describes the result of this mutation?AThe entire sequence of amino acids is changed.BThe RNA strand does not code for the correct amino acids.CThe change in amino acids shortens the polypeptide sequence.DThe alternation of a single nucleotide encodes for a different amino acid.
What will happen if external factors affect cell division in a group of cells placed in a culture dish? A) Anchorage dependence will cause the cells to attach to each other after dividing. B) Anchorage dependence will prevent the cells from dividing until they attach to the dish. C) Density-dependent inhibition will cause the cells to divide until the dish is completely full. D) Density-dependent inhibition will destroy large cells to create room for new cells.
Answer:
C) density-dependent inhibition will cause the cells to divide until the dish is completely full
Explanation:
Just took the exam
Multiple Choice: Please select the best answer and UICK
Which of the following items was Darwin able to use to study the structures of
extinct organisms?
A. Fossils
O B. Species
O C. Amino acids
O D. Adaptations
Answer:
The correct answer is fossils
Explanation:
Because fossils are used in studying extinct animals.
Hope this helps....
Have a nice day!!!!
Explain how Darwin’s theory of evolution by natural selection may have led to all giraffes having long necks.
Answer:
Because this individual had a longer neck, it was able to reach food sources that other animals couldn't...
How is multi cellularity advantages over increasing the mass of a single cell
Answer:
Multicellular organisms
hoped i helped
Do you agree or disagree, why or why not, give examples. The knowledge produced by science builds on old ideas and is constantly changing.
Answer:
agree
Explanation:
people are never going to stop learning
things will evolve
what has been discovered in the past is still relevant
The knowledge produced by science builds on old ideas and is constantly changing agree.
What is Science?Science is a methodical process that creates and arranges knowledge in the form of universe-related explanations and predictions that can be put to the test.
Some of the earliest archeological evidence for scientific reasoning is tens of thousands of years old, and science may be as old as the human species.
In the period between 3000 and 1200 BCE, Mesopotamia and Ancient Egypt produced the oldest written documents in the history of science. Greek natural philosophy of classical antiquity, where formal attempts.
Therefore, The knowledge produced by science builds on old ideas and is constantly changing agree.
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ang Chlorophy
1. Which cell types remain in a non dividing stars and do not comes the trials
process?
-cles of Cells
A muscle cells and nerve cells
B skin cells and muscle cells
cles of Cells
C muscle cells and skin cells
D liver cells and nerve cells
Answer:
A. Muscle and Nerve cells
Explanation:
These two kinds of cells remain in a non-dividing state. The rest of these cell types multiply/divide.
Which type of chromosomal disorders seems to have the greatest affect on a person’s health—disorders involving autosomes or sex chromosomes? Why do you think this might be the case? thanks in advance
Answer:
Disorders involving sex chromosomes.
we can take Turner's syndrome n klinefelter's syndrome as examples.
Why do turtles hv paddle like flippers ?
Answer:
The answer is
Explanation:
Turtles have paddle like flippers to push back water while swimming.
Answer:
Turtles hv paddle like flippers so that they can push the water backward, move forward and swim easily
what is biology definition in details
Answer:
Biology :[tex]<font color=green>[/tex]
the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behaviour, origin, and distribution.
[tex]<font color=pink>[/tex]
#Be Brainly
Answer:
The word biology is derived from the greek words /bios/ meaning /life/ and /logos/ meaning /study/ and is defined as the science of life and living organisms. An organism is a living entity consisting of one cell e.g. bacteria, or several cells e.g. animals, plants and fungi.
Hope this helps! :D
The immune response of a host against an invading bacterium is often triggered by surface components on the bacterium that are recognized as "non-self" or "foreign" by the host. These non-self components, often protein or polysaccharide in nature, are referred to as antigens. The host responds to these antigens by making antibodies that will react with invading bacteria and mark them or tag them for destruction by phagocytes.
Indicate the bacterial structures that are likely to be antigens, to which host antibodies bind, marking the invader for phagocytosis
a. fimbriae
b. ribosomes
c. cell wall
d. plasmids
e. flagella
f. capsule
g. nucleoid
Answer:
The correct answer is :
a. fimbriae
e. flagella
c. cell wall
f. capsule
Explanation:
There are several bacterial structures that are binds to the host cells and likely to be antigens to which specific antibodies attached to mark or destruct them by phagocytes.
These bacterial structures are common in the fact that all these structures have binding ability to the host cells and invading them some of these structures are : fimbriae, cell wall, flagella, and capsule that are attached to antibodies and cell of the host.
Thus, the correct answer is :
a. fimbriae
e. flagella
c. cell wall
f. capsule
The diagram summarizes the light-dependent reactions of photosynthesis. A diagram shows the light-dependent reactions of photosynthesis. x goes to the light dependent reaction. The light dependent reaction goes to chemical energy and oxygen. What is the input of the light-dependent reactions, labeled X? CO2, H2O, O2, and light CO2, H2O, and light CO2 and H2O H2O and light
Answer:
Although there is no diagram attached to this question but it can be answered based on the general knowledge of photosynthesis. The answer is:
H2O and light
Explanation:
Photosynthesis is a unique phenomenon that occurs in the Chloroplast of plant cells. It is the process by which plants and other autotrophs obtain their energy source (food) in the presence of sunlight. Photosynthetic process occurs in two distinct stages viz: light dependent reaction and light independent reactions.
The light dependent reaction, as the name implies, is dependent on light to occur. It occurs in the Thylakoid membrane of the Chloroplast, where a photon of light is captured by the Chlorophyll pigment and the energy is used to split molecule of water in a process called PHOTOLYSIS OF WATER. The transfer of electrons across the thylakoid membrane creates a proton pump, which is used to generate ATP and NADPH. NADPH and ATP are electron and energy carriers respectively which enters into the light independent stage in order to synthesize glucose (sugar).
In a nutshell, the inputs of the light dependent stage are LIGHT from the sun, and water (H2O), which provides the proton and electron when split.
Answer:
its D
Explanation:
Why is it necessary to separate oxgynated blood and deoxgynated blood in living organisums?
Answer:
For efficient transportation of blood.
Explanation:
What has a greater influence on protein levels? A. Protein degradation has a greater influence because they are denatured faster than the cell can produce them B. mRNA destroyer concentration has a greater influence because it is destroying mRNA before proteins can even be produced C. mRNA destroyer concentration has a greater influence because mRNA is destroyed right after the proteins are produced D. Protein degradation has a greater influence because outside factors like antibiotics can cause it, and it is difficult to recover from
Answer: b
Explanation: i got the answer wrong and i’m looking at the results rn
Protein is being produced with the help of a process called translation in which mRNA gets translated to produce proteins. The translation is followed after the process of transcription of DNA to RNA.
The cause of the greater influence of protein levels has defined as follows:
The destruction of mRNA could greatly influence protein levels as mRNA is considered the source for proteins to get synthesized. This is because if mRNA gets destroyed, proteins would not have been produced at all. Thus, directly influences the levels of protein.
Thus, we can conclude that mRNA destroyer concentration has a greater influence because it is destroying mRNA before proteins can even be produced. Hence, option (b) is the correct answer.
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In humans, the quadriceps muscle is a skeletal leg muscle under voluntary control. As such, it contracts in response to signals from the motor cortex in the cerebrum. If such a muscle contracts involuntarily, that indicates:
Answer:
The correct answer is - operation of reflex arc.
Explanation:
The reflex arc is a unique and special type of neural pathway that starts with a sensory neuron and ends with a motor neuron. In this operation sensory neuron acts as the receptor and motor neuron is effector. This type of neural circuit helps in faster response.
Voluntary muscles like quadriceps muscle are normally in control voluntarily however, such muscle may contract involuntary due to reflex arc. This type of contraction takes place before the signal has even reached the brain.
In this response the sensory neuron takes the signal to the spinal cord and then motor neuron to the effector muscle for faster response.
Thus, the correct answer is - operation of reflex arc.
Hey I know it's a lot who ever answer all I'm going to give brainliest answer thxs 1) DNA is a microscopic molecule made up of only _____ chemicals. 2) In the __________ all that was known about life was what could be seen through a _________________________. 3) Chromosomes are made of _______________ and ______________. 4) The ingredients that make DNA are known by the letters _____________________. 5) The first pictures of DNA were taken using _______________ crystallography. 6) To determine the structure of DNA, Watson & Crick chose to build _______________. 7) Watson & Crick announced they had a DNA model on _____________________. 8) After seeing the model, Rosalind Franklin said that it was _____________________. 9) Chargaff’s rule stated that the amount of _____ and the amount of _____ were equal and the amount of _____ and the amount of _____ were equal. 10) The X-pattern of DNA was the result of a shape known as a _________________________. 11) In a molecule of DNA there could be hundreds of millions of _____________________. 12) The letter ____ always combines with ____ and the letter ____ always combines with ____. 13) Watson & Crick produced their final model on _________________________. 14) Rosalind Franklin never received a Nobel prize because she _______________. 15) For DNA to be replicated it must first be _____________________. 16) The single strand of DNA is then ________________ and formed into a ________________.
Answer:
1) nitrogen bases
2) the 1950’s; microscope
3) DNA and protein
4) nucleotides
5) X-ray diffraction
6) ball-and-stick model-building
7) 25 April 1953
8) was critical to Watson and Crick
9) adenine-timine; guanine-citosine
10) double helix
11) base pairs
12) G with C and A with T
13) 1953
14) died
15) unwound
16) synthesized; a new molecule
Explanation:
Nitrogenous bases are used to construct nucleotides. Until the discovery of the helical shape of the DNA molecule, were only possible to identify the genetic material (chromosomes) by the microscope. Chromosomes are composed of DNA and proteins (histones). Nucleotides are the building blocks of the DNA molecule. The X-ray diffraction data obtained by Rosalind Franklin were used to decipher the DNA structure. The ball-and-stick is a molecular model where atoms are represented by spheres and bonds are represented by rods. Chargaff's rules indicate that the content of cytosine is equal to guanine and adenine is equal to thymine. Rosalind Franklin died of ovarian cancer in 1958. The double-stranded DNA molecule must be unwound and then the DNA strands serve as templates to synthesize identical DNA molecules.
Which kind of cells do plants and animals have?
Answer:
Animals and plants are made of cells. Tissues are made from cells of a similar type. Organs are made from tissues, and systems are made from several organs working together.
Explanation:
Answer:
Eukaryotic
Explanation:
They have membrane-bound organelles such as the nucleus and mitochondria.
2. Explain the factors that led Wilson to the idea of (a) studying small islets, (b) fumigating them, and (c) observing the recolonization of species.
Answer and Explanation:
The ecologists MacArthur and Wilson took the term island biogeography theory to refer to the predictions about the number of species that could be inhabiting on an island.
Island biogeography theory establishes that the two factors that affect species richness in natural communities on an island are the distance from the mainland and the size of the island.
At the same time, these factors affect inmigration and extinction rates. According to the theory, islands that are closer to the continent have higher possibilities of receiving immigrants than those islands that are located farther from the mainland. This is the effect of distance.
The effect of size is reflected in the relation between island size and species diversity. In smaller islands, the probability of extinction is higher than in bigger islands. Bigger islands can have more species than smaller ones.
In the case of two islands of the same size and different distance to the mainland, both of them will have the same extinction rate, but the one closer to the continent will have a higher immigration rate, and so, a higher amount of species. The S value will be higher on the island closer to the continent.
Experiment:
To prove that the observations about the species richness and its relation to island size and distance to the continent were not a casualty, manipulation experiments were developed. These experiments helped to prove how the colonization process take place from cero. To observe the entire process of ecological succession and the tendencies proposed by the island biogeography theory Wilson and Simberloff (1970) eliminated the fauna on some islands to observe how they were recolonized from the continent. They fumigated the mangler island and studied these islands to account for the variation in arthropod richness over time. They studied many islands classified by distance. On each island, the richness increased at different rates. The island closest to the continent received more immigrants and is colonized faster than the other ones, reaching its original richness faster. The farthest island was recolonized but at a much lower rate and it does not reach equilibrium while the study was going on. Although, it was expected to reach equilibrium with time.
What is conjunctivitis
Answer:
[tex] \underline{ \underline \orange{see \: below}}[/tex]
Explanation:
Conjunctivitis is an inflammation, infection of the conjunctiva. It is the most common ocular disease worldwide.It is characterized by a pink appearance because of subconjuctival blood vessels hemorrhage.
Simply, we can define it as :
Conjunctivitis ( pink eye ) is an inflammation or infection of the transparent membrane ( conjunctiva ) that lines your eyelid and covers the white part of your eyeball.
Pink eye is commonly caused by a bacterial or viral infection , an allergic reaction or in babies.
The most common pink eye symptoms include:
Redness in one or both eyesItchiness in one or both eyesA gritty feeling in one or both eyesHope I helped !
Best regards!
2. From the knowledge of nutrition:-
a) What five conditions are necessary for photosynthesis to occur
Answer:
Carbon dioxide
sunlight
oxygen
chlorophyll
water
Hope this helps u
is the world safe place for animals and plants?
Guys pls answer it
Answer:
No it isn't
Explanation:
Nothing is ever safe everything is constantly trying to kill you and the same goes for animals. Wether it be humans or other animals and even their own bodies.
Answer:
Wildlife sanctuary is the place where wild animals are protected in their natural habitat. Here poaching or capturing the animals is prohibited. Biosphere reserves are the area used to conserve biodiversity like plants, animals and microorganisms. It contains many wildlife sanctuaries and national parks.
Explanation:
3. Which plants are usually the first to grow during secondary succession?
A ferns
Blichens
Cweeds
D trees
Answer:
ferns
Explanation:
these are alsi known as conifers which require a great amount if light
Im not a science student just trying beans I guess
If a cell has 24 pairs of chromosomes in its diploid state, how many
chromosomes will it have after Meiosis 2?
A. 12
B. 24
C.48
D. 6
Answer:
option A is correct that is 12
Explanation:
meiosis occur in two phases in first phase DNA replication occur and amount of DNA become doubled without any change in the chromosome number and two daughter cell (each 2 n)are formed.
now in stage 2 each daughter cell undergoes mitosis with the formation of two cells with half chromosomes(n)
now 2n=24
n=24/2 =12
after meiosis stage 1...........two daughter cell each with 24 chromosomes
stage 2 .............each daughter cell form two grand daughter cell each with 12 chromosomes
net result.......4 daughter cell each with 12 chromosome(assuming cell as a diploid cell)
If a cell has 24 chromosomes before cell division then the daughter cell resulting from the mitotic division will have 24 chromosomes while the daughter cell resulting from the meiotic division will contain 12 chromosomes each.
The answer is option A.
What are meiotic and mitotic cell divisions?There are sorts of cell departments: mitosis and meiosis. most of the time whilst humans discuss “cellular division,” they suggest mitosis, the procedure of making new frame cells. Meiosis is the sort of cell division that creates egg and sperm cells. Mitosis is an essential technique for lifestyles.
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Scientific question that could be answered with the help of a microscope
Answer:
Size and structure of microbes.
Explanation:
The scientific question about size and structure of microbes could be answered with the help of a microscope because microscope help us to see very small objects such as bacteria and viruses etc which can not be seen without the help of microscope. With the help of microscope we can measure the size and see the structure of different microbes. So the questions about size and structure could be answered with the help of microscope.
Suppose you take glycine tRNA and modify it so that the glycine is changed to valine. You then find that the amino acid sequence in the generated proteins does not show the expected change. This result would suggest that the protein synthesis machinery recognizes the _______ and is _______ with what was actually found by researchers.
Answer:
Suppose you take glycine tRNA and modify it so that the glycine is changed to valine. You then find that the amino acid sequence in the generated proteins does not show the expected change. This result would suggest that the protein synthesis machinery recognizes the tRNA anticodon and is congruent with what was actually found by researchers.
Explanation:
A group of researchers led by Seymour Benzer demonstrated that the anticodon of the charged tRNA was recognized by the protein synthesis machinery, when they changed the amino acid sequence. This example shows the exact result as found by the researchers.
At label ________, the cell is not hyperpolarized; however, repolarization is in progress, as the sodium channels are inactivated or becoming inactivated, and many potassium channels have opened.
Answer: C
Explanation:
When a neuron receives a stimulus, the sodium channels present in the membrane are opened, and therefore Na+ enters the cell in favour of the concentration gradient, so that the membrane potential changes to positive by means of ion exchange, producing depolarization. If this depolarization reaches a certain threshold value, an action potential is generated. The next step is the opening of the potassium channels and the inactivation of the sodium channels, so that the repolarization of the membrane takes place. The sodium channels, will return to the closed state in the hyperpolarization to continue in this state during all the rest potential achieving the action potential to return to -70 mV (repolarization).; until the arrival of a new action potential which produces the activation and opening of the sodium channels, repeating the cycle again and generating a new depolarizing action. This process is part of the synaptic transmission.
So, hyperpolarization is any change in the cell's membrane potential, which makes it more polarized. This means, hyperpolarization is an increase in the absolute value of the cell's membrane potential. Thus, changes in membrane voltage where the membrane potential is more distinctly positive or negative are hyperpolarizations.
During the repolarization period after an action potential, the membrane potential is more negative than when the cell is in "rest period". In the picture, this repolarization period is about 1-2 milliseconds. So, repolarization is the time in which the membrane potential is hyperpolarized with respect to the resting potential.
In the attached figure, part C indicates this repolarization period.
