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xxMikexx [17]
3 years ago
13

Is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis. A. Translation B. Transcr

iption C. Fertilization D. Crossing over
Biology
1 answer:
Lady_Fox [76]3 years ago
7 0

<u>D.) Crossing over</u> is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.

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PPLLLZZ HELP!!!!
malfutka [58]

Answer:

I think the answer is C I hope you get this right, tell me if I am wrong plz

Explanation:

5 0
3 years ago
Read 2 more answers
We identify nucleic acid strand orientation on the basis of important chemical functional groups. These are the _________ group
Alina [70]

Answer: Option B) phosphate; hydroxyl; 3'

We identify nucleic acid strand orientation on the basis of important chemical functional groups. These are the phosphate group attached to the 5' carbon atom of the sugar portion of a nucleotide and the hydroxyl group attached to the 3'

carbon atom

Explanation:

For both RNA and DNA, chemical groups such as phosphate (PO3-) attaches to the 5' carbon of the pentose sugar (deoxyribose in DNA, ribose in RNA).

While hydroxyl group (OH) attaches to the 3' carbon atom of the pentose sugar.

Thus, a nucleic acid structure structure reveals a several repeating units of nucleotides where nitrogenous base links to a pentose sugar, who in turns is linked to phosphate group

5 0
3 years ago
Please help ASAP for 10pts
masya89 [10]
1. Natural selection is the best of the organisms to live past hardships and survive, leaving the weakest to die. Survival of the fittest.

2. Adaptation is an organism changing to better themselves in a certain environment.

3. These moths were adapted to blend into their surroundings, so as to not be seen by predators.

4. Because of the pollution from the city, the tree’s bark turned from a lighter shade brown to a darker shade brown.

5. A majority of the moths were a lighter gray. With the changing color bark they were seen more by predators.

6. Adaption caused the first darker moths to appear because they learned they needed to blend into the new tree bark color.

7. The change from light to dark gray was very needed for moths. It explains natural selection for those moths who did not adapt to different color gray. Adapting the new tree bark color helped moths been less seen by predators therefor keeping their species more alive.
7 0
3 years ago
Clay and other materials through which water cannot readily pass are
ale4655 [162]

The answer is C or B.

If it was permeable water and other substances could get through.

And hard? That is one of those answer choices teachers throw in to try and make an obvious elimination choice.

I hope I have helped!

8 0
3 years ago
What does it mean if a micrograph is false colored?
lara [203]
A micrograph is "false-colored" because scientists often use computer techniques to add color in the colorless electrons to make certain structures stand out.
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3 years ago
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