Answers
Answer:
here here it helps
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Related Questions
For the voltage-gated sodium channel to allow sodium into the cell:_______.
a. the activation and inactivation gates must both be open
b. only the activation gate must be open
c. only the inactivation gate must be open
d. the inactivation gate must be closed shortly before the activation gate opens
e. the activation and inactivation gates must both be closed
Answers
Answer:
The correct option is - (a) the activation and inactivation gates must both be open.
Explanation:
Option (a) is correct because of the following reason -
The axonal membrane is at its natural resting potential until an action potential occurs, and [tex]Na^+[/tex] channels are deactivated and blocked on the extracellular side by their activation gates. The activation gates open in response to an electric current, allowing positively charged [tex]Na^+[/tex] ions to flow into the neuron through the channels. When enough [tex]Na^+[/tex] has penetrated the neuron and the membrane potential has reached a certain level, the [tex]Na^+[/tex] channels inactivate themselves by closing their inactivation gates at the height of the action potential. The inactivation gate can be thought of as a "plug" tethered to the intracellular alpha subunit's domains III and IV. When the inactivation gate is closed, the flow of [tex]Na^+[/tex] through the channel is stopped. As a result, both the activation and inactivation gates must be open to enable sodium ions to enter the cell.
Hence , the correct option is (a).
A population of raccoons is thought to be in Hardy-Weinberg equilibrium for a tail-length gene. The frequency of the dominant allele (long tails) is 0.8. When a certain forest was surveyed, the scientist was able to tag 25 animals, which were all long-tailed. Does the lack of short-tailed animals suggest that the population is out of Hardy-Weinberg equilibrium in this forest?
A. Yes, because the survey shows 100% AA individuals, so the short tils must have been selected against.
B. No, because you would only expect 4 of the surveyed racoons to be short-tailed, so they may have been missed by chance.
C. Yes, because 20% of the surveyed raccoons should have been short-tailed.
D. No, because you would only expect 4% of the raccoons to be short-tailed, so they may have been missed by chance.
Answers
Answer:
D. No, because you would only expect 4% of the raccoons to be short-tailed, so they may have been missed by chance.
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
Answer:
D
Explanation:
We experienced a technical problem when submitting the answer to this question. SO, to avoid that, we carefully typed the step-by-step explanation in a word document, made a screenshot of it, and attached it in the image below. The first image shows the technical glitch we experienced and the subsequent images show the explanation of the question.
Thanks.
The microscope best for viewing living cells at low levels of magnification is the
electron microscope.
True
False
Answers
Answer:
the answer is true I hope it helps
PLS HELP ILL GIVE YOU BRAINLEIST PLS PLS PLS PLS PLS PSL
Answers
Answer:
on what question should i help u with?
Explanation:
Diabetes is a disorder of which body part? O the adrenal gland the thyroid the pancreas the liver
Answers
Answer:
The pancreas
Explanation:
it happens when the pancreas doesnt produce enough of something called insulin
Food is useful to organisms because it contains ? Radiant energy, thermal energy, motion energy, chemical energy
Answers
Answer:
Chemical energy
Explanation:
Because food passes through chemical reactions. eg. digestion of food is a chemical reaction
When both lactose and glucose are available to E. coli, which part of the lac operon regulation assures that glucose will be metabolized first? When both lactose and glucose are available to E. coli, which part of the lac operon regulation assures that glucose will be metabolized first? Permease allows lactose to enter the cell when lactose enters the cell. The repressor binds to the operator in the absence of lactose. The repressor cannot bind to the operator in the presence of lactose. RNA polymerase transcribes the lac operon to make a single RNA molecule. CAP binds to cAMP and then to the promoter only in the presence of low glucose.
Answers
Answer:
CAP binds to cAMP and then to the promoter only in the absence of low glucose
Explanation:
When both lactose and glucose are available to E. coli, the part of the lac operon regulation that assures that glucose will be metabolized first is
CAP binds to cAMP and then to the promoter only in the absence of low glucose
Lactose is a type of sugar that is found naturally in milk produced by mammals and Glucose is a monosaccharide made mostly by plants during photosynthesis
Which of the following options best depicts the flow of information when a gene directs the synthesis of a protein?
protein>RNA>DNA
RNA>DNA>RNA>protein
DNA>RNA>protein
DNA>tRNA>mRNA>protein
Answers
Answer:
DNA → tRNA → mRNA → protein.
Explanation:
I believe that the above given option should depict the flow of information when a gene directs the synthesis of a protein.
Which one of the following statements is not true? Enzymes,
A) are typically consumed by the reactions they promote
B) are proteins that change the rate of chemical reactions.
C) have structures that correspond to their function.
D) function as organic catalysts.
E) regulate virtually all chemical reactions in a cell.
Answers
Answer:
statement c
Explanation:
d and c are very different so it would be those two but function is organic so its c
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answers
Answer: d
Explanation:
They are compe for the same prey which means this is a survival competition
Please help me with this page
Answers
Answer:
2.D 3.nitrogen and oxygen 4.at the poles 5. 8 minutes and 20 seconds 6.B
Explanation:
Jim observes that his pet lizard is more active on warm, sunny days than at night or during rainy days.
Which statement is the most valid hypothesis he can make from this observation?
Lizards are more active when they feel more comfortable.
Lizards like warm temperatures.
O If the temperature increases, then lizards become more active.
If the lizard is active, then the temperature must be cool.
Answers
Answer:
If the temperature increases, then lizards become more active.
Explanation:
Match the body cavity type to its proper description. - Coelomate - Pseudocoelomate - Acoelomate - Coelom A. A fluid or air-filled space between the digestive tract and the outer body wall. B. Completely lacks a body cavity between the digestive cavity and outer body wall. C. Has a body cavity lined by tissue derived from the mesoderm and by tissue derived from the endoderm. D. Has a body cavity completely lined by tissue from the mesoderm. E. Germ Layer
Answers
Answer: A. A fluid or air-filled space between the digestive tract and the outer body wall. - Coelom
B. Completely lacks a body cavity between the digestive cavity and outer body wall. - Acoelomate
C. Has a body cavity lined by tissue derived from the mesoderm and by tissue derived from the endoderm. - Coelomate
D. Has a body cavity completely lined by tissue from the mesoderm. - Pseudocoelomate
E. Germ Layer- Coelomate
Explanation:
Coelom is a fluid filled body cavity which stores food, blood like fluid in it in some animals.
Those organisms which do not possess the body cavity or coelom they are called as acoelomate. Example, Platyhelminths
Those animals which have a body cavity derive from the germinal layers ectoderm, endoderm, and mesoderm are coelomate. Example, Annelids
Those animals which have scattered pouches which are not lined by all germinal layers instead one mesoderm will not be able to form coelom. These are called as pseudocoelomate. For example, Nematodes.
Which characteristic would you find in an advanced organism?
A acoelum organism
B protostome organism
C pseudocoelum organism
D deuterstome organism
Answers
Answer:
Deuterosome
Explanation:
This because deuterosome are organisms which posses both mouth and anus. The mouth is in the opposite side as anus. These is normally found in advance organism compare to prostosome which have mouth only.
The deuterosome are mainly chordates, echinoderms e.t.c.
23. According to the chromosome theory of
inheritance,
A the traits of an individual
organism are a blend of its parents'
characteristics.
B the traits of an individual organism
are controlled by genes with only two
possible alleles.
C genes pass from parents to their
offspring on chromosomes.
D a sperm and an egg cell join during
the process of fertilization.
Answers
Answer:
C. genes pass from parents to their offspring on chromosomes.
The purpose of mitosis is to ___, while the purpose of meiosis is to ____.
a) make new cells, and only germ-line cells do it;
b) make eggs or sperm, and all the body cells do it make eggs or sperm, and only germ-line cells do it;
c) make new cells, and all body cells do it make eggs or sperm, and only somatic cells do it;
d) make new cells, and all body cells do it make new cells, and all body cells do it;
e) make eggs or sperm, and only germ-line cells do it
Answers
Answer:
A) make new cells(somatic cells)and only germ-line cells do it(meiosis)
Explanation:
Meiosis is the process through which germ cells that produce gametes such as sperm and eggs are formed. It is an equatorial division that involves the parental cell dividing into daughter cells each containing similar genetic material as the parents cell and this can be passed on to successive generation.
While Somatic cells are cells that form the building blocks of the body, they are the actively divided body part and only divide by mitosis.
Meiosis produces germ cells while mitosis produces somatic cells.
The changes that occurred in Yellowstone National Park after all of its wolves
were killed showed that wolves are
A. harmful to the ecosystem
B. the only producers in the ecosystem
C. beneficial to the ecosystem
a
D. unnecessary for the survival of other species
Answers
HELPPPPPPPP!!!! what is a mutation that a polar bear can have to help conserve energy and how do genetic mutations relate to chromosomes, genes, protein, and DNA?
Answers
Answer:
wings
Explanation:
please hurryyyyy!!!!!
These traits are found on chromosome #23 and specifically on the X chromosome
a. sex influenced traits
b. linked traits
c. sex linked traits
d. multiple alleles
Answers
Answer:
C. Sex linked traits.
Explanation:
It explains more on https://www.sciencedirect.com/topics/neuroscience/x-chromosome.
Food is useful to organisms because it contains ? Radiant energy, thermal energy, motion energy, chemical energy
Answers
Answer:
I think it's chemical energy.
Science question!!!
Why is all of geologic time before the Cambrian Period sometimes collectively lumped together called the "Precambrian"?
A-We have very few fossils from the time
B-Nothing lived during that time
C-The time period was very short
D-Everything from that time was destroyed by volcanos.
Answers
The answer is A-We have very few fossils from the time
2. Geothermal energy is possible where there is
*
O A wind.
O Boil.
O C coal
O O magma.
Answers
Answer:
Explanation:
Option D magma is the correct answer
can the behavior of a material or substance be considered a physical property? Explain why or why not.
Answers
Answer:
yup it can be considered as the physical property like as if the solid is hard it can hurt to so it has the property of being hard and behavior of being hurted
Choose the best answer for the following question:
What kind of information can be gained about an organism from its scientific name?
a
what genus it is
b
what species it is
c
where it lives
d
what genus and species it is
Answers
What features of eukaryotes provide additional opportunities for the regulation of gene expression compared to bacteria? Select all that apply. Select all that apply. interaction with external environment transcription and translation are coupled processes separated processes of transcription and translation presence of chromatin opportunity for posttranscriptional and pre-translational regulation activation of all genes in genome
Answers
Answer:
separated processes of transcription and translation presence of chromatin opportunity for posttranscriptional and pre-translational regulationExplanation:
Since there is no nucleus surrounding the genetic material in prokaryote cells, the transcription and translation processes occur simultaneously. Transcription stops when a protein is not necessary. So the control of protein synthesis is regulated by transcription and not translation. Once the transcription is on, all the following steps must follow it.
Transcription is the process that controls the genic expression in bacteria.
Eukaryotes do possess a nuclear membrane that separates the genetic material from the rest of the cell. The transcription process occurs inside the nucleus membrane, while the translation process occurs outside. In the cytoplasm occur the translation process and protein synthesis. Genic regulation can happen in any of these processes in different regions of the cells.
In eukaryotes, the regulation of the genic expression control might happen at different levels:
Epigenetic level: When DNA molecules open and nucleosomes separate to join the transcriptional factorsTranscription level: When the messenger RNA is being transcriptedPost-transcription level: When mRNA goes to the cytoplasm Translation level: During the protein elongationPost-translation level: Once the protein synthesis is over.What are the effects of cystic fibrosis
Answers
The largest endocrine gland (s) that makes 3 hormones that affect the metabolism is the: *
A. pituitary gland
B. thyroid gland
C. pancreas
D. adrenal gland
Answers
Answer:
The largest endocrine gland (s) that makes 3 hormones that affect the metabolism is the: thyroid gland.
The largest endocrine gland that makes three hormones that affect metabolism is the Pancreas. Thus, the correct option for this question is C.
What do you mean by Endocrine Gland?An endocrine gland may be defined as a type of gland which consists of several organs that make hormones and release them directly into the blood so they can travel to tissues and organs all over the body. These hormones control many important functions in the body, including growth and development, metabolism, and reproduction.
The pancreas is the largest endocrine gland that significantly makes three hormones namely, Insulin, Glucagon, and Somatostatin. These hormones are actively involved in the regulation of metabolism by numerous mechanisms.
For example, insulin lowers the level of sugar in the blood, while glucagon increases the level of sugar by transforming its storage form.
Therefore, the largest endocrine gland that makes three hormones that affect metabolism is the Pancreas. Thus, the correct option for this question is C.
To learn more about Endocrine glands, refer to the link:
https://brainly.com/question/4455660
#SPJ2
Describe asexual reproduction.
A. It is when a new organism forms from a piece of the original
B. It is when a new animal grows out from the parent until it fully matures and breaks off
C. It is a reproductive process that involves only one parent and produces offspring that are genetically identical to the parent
D. It is a reproductive process that involves two parents combine their genetic material to produce a new organism which differs from both parents
Answers
Answer:
c
Explanation:
Answer:
C hope this help
Explanation:
Many scientists say that there is a good reason for gaps in the fossil record. Can you explain why some extinct animals and plants were never fossilized?
Answers
Answer:
For an organism to become a fossil, it must not decompose or be eaten. This can happen if the organism either lives within or is moved to a place where it can be buried and kept from decaying. When an organism is buried quickly, there is less decay and the better the chance for it to be preserved.
Explanation:
I copied and pasted from https://www.americangeosciences.org/education/k5geosource/activities/investigations/fossils/how-fossils-form ,it might help for your work.
1. What do you understand by the resolution or resolving power of a lens?
Answers
Answer:
The resolving power of an objective lens is measured by its ability to differentiate two lines or points in an object. The greater the resolving power, the smaller the minimum distance between two lines or points that can still be distinguished. The larger the N.A., the higher the resolving power.
Explanation: