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Advocard [28]
3 years ago
8

what is the characteristic of a cell membrane that controls which substances can enter and exit the cell

Biology
1 answer:
lorasvet [3.4K]3 years ago
3 0

Answer:

selective permeability

Explanation:

The property or characteristic of cellular membrane to allow certain substances to pass through the cell is known as selective permeability. The movement of molecules and ions across the cell can be active or passive.

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Look at the slide from an oral presentation about fossils. A slide that reads, "Fossils: How they help us understand the past."
Morgarella [4.7K]

a caption

Explanation:

In a presentation slide, pictures should carry appropriate captions that describes them.

A good picture caption makes presentation very effective and easy to relate with.

  • A good caption is one that give information about the picture it is capping.
  • The source of the picture in use should also be shown at the reference section.
  • The picture must relate with the context of the presentation.

Learn more:

Presentation brainly.com/question/7874371

#learnwithBrainly

3 0
4 years ago
Read 2 more answers
Related to episode 3: which of mary's affected cranial nerves is responsible for her double vision when looking right? why does
mixas84 [53]
<span>In Mary's case, the abducens is affected/ The abducens is a motor neuron that is responsible for innervating the lateral rectus muscle, this helps the pull the eye in a lateral direction. In Mary's case, only the right branch of this is affected so when she looks right the eye is simply not able to rotate laterally and she has double vision. The medial rectus muscle that is found in the right eye is responsible for pulling the eye so that she can look left. The oculomotor nerve is in charge of innervating this particular muscle and when it comes to mary's case, her cranial nerve III is not affected.</span>
5 0
3 years ago
The key to the evolution of altruism is that a. recipients have to be more likely to carry the altruistic allele than nonrecipie
cupoosta [38]

Answer:

The correct answer is b. actors have to be more likely to carry the altruistic allele than non actors.

Explanation:

Altruism is the behavior by an organism that benefits other organisms by costing its own fitness. The actor is the individual who is doing altruism and the recipient is the individual who is getting benefited by the actor's altruism.

An example of altruistic behavior can be seen in animal kingdom easily. Vampire bats give blood to those members of the community who were not able to go for search for blood show altruistic behavior.

Actors have altruistic genes that suggest them to behave altruistically. Non-actors may not contain alleles of altruism but the recipient might have altruistic alleles.

Hamilton's rule says that natural selection will favor the altruistic allele when rb > c.

where r = coefficient of relatedness between donor and recipient

          b = benefit received by recipient and

          c = cost paid by altruist.

Therefore, the correct answer is b.

6 0
4 years ago
List and describe the role of the 3 types of rna.
steposvetlana [31]

<span>There are three RNAs with a role in the synthesis of protein.</span>

mRNA, or messenger RNA, is the link between a gene and a protein. The main role of this ribonucleic acid is in transcription (”reading“) of DNA. The DNA is transcribed by RNA polymerase, and the resulting product of this process is mRNA. This form of RNA can be modified post-transcriptionally with methylguanosine caps and polyadenosine tails. RNA carries the genetic information which is copied from DNA and the information has a form of three-base code (“words”), codons. Each of these codons specifies a particular amino acid.

tRNA or transfer RNA is the molecule with the main function in translation by "decoding" the mRNA message during this process. Each type of amino acid has its own type of tRNA and also has a three-base sequence (anticodon) that can bind complementary with the codons in the mRNA.

rRNA or ribosomal RNA is a main component of ribosomes. rRNA associates with a set of proteins to form ribosomes which catalyze the assembly of amino acids into polypeptide chains (protein).

 

<span>There are also a few more types of RNA which have a regulatory function like, microRNA or siRNA.</span>

4 0
3 years ago
A solution of chloroform (CHCl3) and acetone((CH3)2CO) exhibits a negative deviation from Raoult's law. This result implies that
Korolek [52]

Answer:

The answer is W. chloroform-chloroform and acetone-acetone interactions are stronger than chloroform-acetone interactions. This is because the bond between acetone-acetone is a dipole-dipole interactions and chloroform-chloroform dipole-dipole compared to the weaker hydrogen-bonding between acetone-chloroform.

It turns out that this hydrogen-bonding happens to be stronger the original dipole-dipole forces, so this shows NEGATIVE DEVIATION from Raoult's law.

8 0
3 years ago
Read 2 more answers
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