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Korolek [52]
2 years ago
11

What is a prokaryote, and when did prokaryotes arise?

Biology
1 answer:
RideAnS [48]2 years ago
8 0
<span>A prokaryote is a unicellular organism that belongs to either the domain Bacteria or the domain Archaea. Therefore, unlike a eukaryote, the prokaryote lacks in a nucleus and other organelles. The first organisms that appeared about 3.5 billions years ago were prokaryotes. They developed primitive forms of photosynthesis without oxygen as a waste. The first photosynthesizing prokaryotes appeared about 2.7 billion years ago which led to the changes in Earth atmosphere and consequently organisms dependant on oxygen could arise.</span>
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During transcription the DNA base sequence is transcribed into a complementary mRNA sequence. A codon table like the one shown b
DIA [1.3K]

Answer: Option B) No, even though the DNA sequence changed, the sequence still codes for the same amino acid, so no change in phenotype will occur.

Explanation:

Since the triplet codon ACG codes for the amino acid threonine, so also ACA codes for threonine, the single base change of Guanine (in ACG) to Adenine (ACA) is insignificant due to the degeneracy of the genetic code.

Thus, the sequence still codes for the same amino acid, so no change in phenotype will occur

4 0
2 years ago
What are types of scientific explanation​
vagabundo [1.1K]

Answer:

theories, models, and laws

Explanation:

5 0
3 years ago
PLEASE HURRY!!!
kvasek [131]

B) Frost


Frost is a thin layer of ice on a solid surface, which forms from water vapor in an above freezing atmosphere coming in contact with a solid surface whose temperature is below freezing, and resulting in a phase change from water vapor to ice as the water vapor reaches the freezing point.


3 0
3 years ago
Read 2 more answers
How does the recesive sickle-cell allele stay in the gene pool
Zina [86]

Answer:

Because natural selection selects for it. Thus it persists.

Explanation:

You have to understand heterozygote advantage. Basically, it's where heterozygotes have an advantage over homozygotes. In the case of sickle cell disease, heterozygotes have an advantage, and natural selection favors whatever is advantageous. Thus, because heterozygotes each have one recessive sickle-cell allele, as natural selection favors the heterozygotes, the recessive sickle-cell allele persists and remains in the gene pool.

7 0
3 years ago
the efficiency of aerobic metabolism is greater than that of anaerobic metabolism even though much more energy is released in ae
Nitella [24]

Compared to anaerobic metabolism, aerobic metabolism retains a lot additional energy in the manner of ATP.

<h3>What is the straightforward meaning of metabolism?</h3>

the alterations in an organism's or a cell's chemistry. These modifications generate the ingredients and energy that cells and organisms require to develop, procreate, and maintain health.

<h3>Does weight change with metabolism?</h3>

You will consume more calories both at rest and when you are active if overall metabolism is "strong" (or quick). You'll need to consume more calories to maintaining your weight if you have a strong metabolism. That is one of the reasons why some people are able to consume more than before without putting on weight.

To know more about metabolism visit:

brainly.com/question/1189010

#SPJ4

7 0
1 year ago
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