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S_A_V [24]
2 years ago
7

Why do you think it is important that the sugar – phosphate backbone of dna is held together by covalent bonds, and the cross –

bridges between the two strands are held together by hydrogen bonds?
Biology
1 answer:
Yanka [14]2 years ago
4 0
As covalent bonds are strong it makes the sugar phosphate backbone a stable molecule which will HV less chances for a mutation while the huydrogen bonds exist for the ease of DNA replication as they are strong in a way but weak for the replication to take place easily.
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Protonema have large surface area to volume ratio you can predict that
Vaselesa [24]

Answer;

-They are absorptive interfaces with the environment.

Explanation;

-The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume.

-The surface area to volume ratio of an object is the relationship between two measurements. It is the ratio of Surface area to volume. It shows the comparison between the size of the outside of an object and the amount inside. Small or thin objects have a large surface area compared to the volume.

6 0
2 years ago
Fully explain in your own words your thoughts on the following questions: Are mutations good or bad for a population?, IN YOUR O
marysya [2.9K]

Answer:

mutations can be either beneficial or harmful depending on the environment

Explanation:

Mutations can be defined as genetic changes in the nucleotide sequence of the genome of one organism. Mutations are usually neutral, but they can also be deleterious and/or beneficial depending on the environment. For example, recessive mutations that cause sickle-cell anemia, which is a recessive genetic disease that affects homo-zygous individuals, have shown to be advantageous for heterozygous individuals living in regions where malaria is endemic. Beneficial mutations can be selected by natural selection, thereby increasing their frequency in the population.

5 0
2 years ago
What structure is attached to the nuclear envelope and lined with ribosomes?
sveticcg [70]

Good afternoon, Nicol3713. I think the answer would be B - Rough ER because the bound ribosomes are attached to the rough ER or nuclear envelope. It should be right. Let me know if you need any more help. Have a great day!!

5 0
3 years ago
Read 2 more answers
Compare how solar energy is absorbed and emitted by Earth's surface
bekas [8.4K]
About 23 percent of incoming solar energy is absorbed in the atmosphere by water vapor, dust, and ozone, and 48 percent passes through the atmosphere and is absorbed by the surface. Thus, about 71 percent of the total incoming solar energy is absorbed by the Earth system.
8 0
3 years ago
How do the chromosomes in most cells of an organism, such as the leaf cells of a plant, compare to the chromosomes in its reprod
Lunna [17]

Answer:

Reproductive cells have half the amount of chromosomes than body cells

Explanation:

I think that you are talking about body cells when you say "most cells in an organism." If that is the case, then the reproductive cells, sperm and egg cells, have half the amount of chromosome than body cells.

For example: Human body cells have 46 chromosomes. Human reproductive cells has 23 chromosomes.

In sexual reproduction, each parent gives 1/2 of a full set of chromosomes to create the full set needed for an organism.

8 0
2 years ago
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