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Helen [10]
3 years ago
13

Explain why bacteria and archaea are prokaryotic cells and all other organisms are eukaryotic cells

Biology
1 answer:
scZoUnD [109]3 years ago
8 0

Answer:

Archaea and bacterial cells lack organelles or other internal membrane-bound structures. Therefore, unlike eukaryotes, archaea and bacteria do not have a nucleus separating their genetic material from the rest of the cell.

Explanation:

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What characteristics of DNA results in cell differentiation in developing embryos?
Elina [12.6K]

Hi!


The correct option is B. Which genes are active.


Embryonic differentiation is a developmental process by which embryonic cells give rise to specialized cells and a diverse range of tissue structures. All of this unique cells essentially rise from a type of cells that are known as pluripotent cells.

But how do these pluripotent embryonic stem cells know which cells to differentiate into? This is where genes come into play. The cell has an inherent signalling ability that determines which gene is to be active and expressed. These specifically activated genes then translate into proteins for which it is specific, giving each cell, tissue and organ its particular identity.


Hope this helps!

5 0
3 years ago
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Rina8888 [55]

Answer:

decreases reabsorption of calcium by the kidneys

Explanation

from what ive found, calcitonin stops osteoclast activity, makes bones stronger, stimulates the sythesis of vitamin D, but does not (in anywhere i have read) decrease reabsorption in the kidneys. I really hope this helps.,,

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8 0
3 years ago
The lineage of pea plants produced round seeds for four generations. The plants that fertilized these pea plants also produced r
adell [148]

Yes, it is possible.

In this case both of the parental plants were heterozygotes and they manifested dominant allele in their phenotype, which is round seed.

P: Aa x Aa

F5: AA, Aa, aA, aa - possible genotypes in fifth generations.

A- dominant allele (round seeds); a- recessive allele (wrinkled seeds)

Wrinkled phenotype is manifested only if there are two recessive alleles present.

3 0
2 years ago
What kind of reaction adds water to break large bio molecules into subunits
Romashka-Z-Leto [24]
This is called hydrolysis .
8 0
3 years ago
Read 2 more answers
Please help:
Oksana_A [137]

Answer:

a

Explanation: because a prokaryote is a simple single-celled organism that lacks an organized nucleus or any other membrane-bound organelle

6 0
2 years ago
Read 2 more answers
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