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vichka [17]
3 years ago
6

Explain the purpose of dna

Biology
2 answers:
mina [271]3 years ago
4 0

Answer:

Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living things. All known cellular life and some viruses contain DNA. The main role of DNA in the cell is the long-term storage of information.

Explanation:

Vinil7 [7]3 years ago
3 0
If adopted or any other circumstance wanted or needed to find out if someone is related, etc. You could take a DNA test to see if related.
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A male cardinal's red color is an example of a trait affected by natural selection. The females of the species choose mates
kompoz [17]

Answer:

In the cardinals, if the females start using a different criterion than the color of the feather when they choose couple, most likely to happen is that decreased variation in the shades of red because no form of the trait is advantageous.

Explanation:

Options for this question are:

  • <em>Increased variation in the shades of red because the selection pressure has been relieved.</em>
  • <em>Increased variation in the shades of red because the cardinals try different ways to impress the females.</em>
  • <em>Decreased variation in the shades of red because no form of the trait is advantageous.</em>
  • <em>Decreased variation in the shades of red because the only reason for variation was selection pressure.</em>

In the context of natural selection, male cardinals court females using the coloring of their feathers as a form of sexual selection. This means that the shades of red in the feathers are a selection criterion in these birds, and the more visible shades represent an advantage.

But, if the selection criterion was not the color of the feathers, this trait would no longer represent an advantage in the competition between the males to be chosen as a mate. Instead, the trait that would determine sexual selection would be the one that experiences an increase in its variation<em>.</em>

5 0
3 years ago
Gunter is going to have a medical test next week to capture changes in his brain activity. the technique reveals patterns of blo
Paul [167]

Gunter will be undergoing functional Magnetic Resonance Imaging (fMRI).

This technique for brain activity measuring is based on the fact that cerebral blood flow and neuronal activation are coupled. Blood flow increase in an area of the brain that is in use.


5 0
3 years ago
Which of the following organelles is the principal and distinquishing feature of the eukaryotic cell? A. ribosomes B. chloroplas
dsp73

Answer:

E. Nucleus

Explanation:

All living organisms were classified into three major domains viz: Eukarya, Archaea and Bacteria. Eukarya are referred to as EUKARYOTES while the other two domains are collectively referred to as PROKARYOTES.

The major basis of this classification is the presence or absence of a membrane bound NUCLEUS. Eukaryotes are organisms characterized by the possession of a membrane-bound nucleus that houses their genetic material (DNA) while prokaryotes lack a nucleus and hence, their genetic material is found naked in the cytoplasm. Although, prokaryotic cells lack other membrane-bound organnelles like Chloroplast, mitochondria etc. but nucleus is the basis of this classification:

EU meaning TRUE, KARYA meaning NUCLEUS, hence Eukarya means organisms will true nucleus.

3 0
3 years ago
I WILL GIVE BRAINLIST IF YOU HELP
Naya [18.7K]

Answer:

B. Sun -> Algae -> Shrimp -> Red drum

Explanation:

The only way for the Sun to transfer energy is through plants, which rely on sunlight for food.

D. is incorrect, because plants cannot consume other vegetation.

8 0
3 years ago
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The ocean contains vast amounts of salts and other minerals. For example, 1 cubic kilometer of ocean water contains about 5,000
valina [46]

Answer:

The ocean is rich.

Explanation:

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