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musickatia [10]
3 years ago
13

How do the atmospheric conditions near the beginning of Precambrian time contrast with the atmospheeic conditions that are prese

nt now? Which organism is largely responsible for this change?
Biology
2 answers:
Art [367]3 years ago
7 0
Early pre-cambrian period the atmosphere consisted only of nitrogen and carbon dioxide without oxygen.

<span>A Prokaryotic cell does not contain a nucleus. It only contains one chromosome and is a single-celled organism. It was the only form of life on earth for millions of years. Examples of a Prokaryotic cell are the different types of bacteria present today.

</span><span>Autotrophs obtain energy by the process of photosynthesis. Any living organism need energy to survive and autotrophs are no different. Two types of autotrophs are present and they are Photoautotrophs and Chemoautotrophs. The Photoautotrophs rely on the energy produced during the process of photosynthesis and the Chemoautotrophs get their energy from most of the inorganic substances. Phtoautotrophs actually get their energy from the sunlight and then convert it into reusable form. In case of Chemoautotrophs ammonia is an important source of energy for them.</span>


Darya [45]3 years ago
5 0

Answer:

The atmosphere has a much greater percentage of oxygen now that it did before. Cyanobacteria is the organism that is largely responsible for this change.

Explanation:

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Genome maps provide the DNA sequences of chromosome. Some scientist have compared the genome maps of a hedgehog and a sloth.What
Ivan

Answer:

The correct answer is D. How closely related the two species are to each other

Explanation:

Genome maps of every individual is unique. Genome map is the order of sequence of nucleotide which is present in an organism. Comparison of genome map allow the scientist to know how much closely related two organisms are.

The map of two individuals of the same species is almost the same. Similarly, the two same species have a more similar genome map than two distantly related species because they share most recent common ancestor.

For example, humans and chimpanzees are more similar than other apes so  96% of the genome are identical between them. So the right answer is D.

8 0
2 years ago
BRAINLIEST!!!!! PLEASE HELP!!!!!
erastovalidia [21]

I don’t know, I’m sorry.

6 0
3 years ago
What kind of plate boundary results in a fault?
Bumek [7]
a transform boundary because the two plates pass each other in that same plane and the blocks of rock move in opposite horizontal directions .
6 0
3 years ago
Read 2 more answers
It is possible for two parents each with brown eyes to produce a blue-eyed child.
elena55 [62]

Answer:

True

Explanation:

The color of the baby's eyes is influenced by the genetic inheritance (of the genes transmitted by the mother and father) and the amount of melanin (brown or black pigment whose type and amount is encoded in the genes) found in the iris.

Eye color is controlled by at least three genes, although researchers still only understand the role of two of them. Determining eye color is an extremely complex process and there are several conditioning factors and genetic combinations that can influence the final color.

The more melanin, the darker the color of eyes, skin and hair. If parents have both brown eyes, it is natural for their children to have the same color. However, there may be a genetic influence from an ancestor and the child expressing a different color.

If the presence of melanin in the iris is reduced, the baby will have blue eyes, even if father and mother have brown eyes. If the presence of melanin is higher, the eye color will be green or hazel. When there is a large production of melanin, the eyes are brown, predominant color over green or blue and therefore more common. The least common color is green.

4 0
3 years ago
Photosynthetic algae create sugars that will eventually be broken down during which process?
UNO [17]
The digestive process, inside the small intestine.
6 0
2 years ago
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