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choli [55]
3 years ago
12

Cyanobacteria were the first photosynthetic organisms. How were they responsible for allowing higher life forms to evolve? A. Th

ey released oxygen, which mixed to form iron, and later ferrous oxide, in the air. B. They released carbon dioxide, which evolving animals needed. C. They released oxygen, which created the ozone layer, resulting in reduced mutation rate.
Biology
2 answers:
mariarad [96]3 years ago
5 0

Correct answer: C). They released oxygen, which created the ozone layer, resulting in reduced mutation rate.

Cyanobacteria are bacteria that are known to get their energy by the process of photosynthesis and they are the only photosynthetic prokaryotes that are able to produce oxygen.

They also play a very important role in shaping the course of evolution. The oxygen atmosphere on which we depend today was first generated by the cyanobacteria during Archaean and Proterozoic eras.

Hence, the correct answer would be option C.

Mumz [18]3 years ago
4 0
I think the correct answer from the choices listed above is option C. Cyanobacteria is responsible for allowing higher life forms to evolve by releasing oxygen, which created the ozone layer, resulting in reduced mutation rate.<span />
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Which type of bond is formed in nitrogen gas?
Nesterboy [21]

Answer:

Covalent bonds are formed in the nitrogen gas.

Explanation:

"<em>Nitrogen atoms will </em><em>form three covalent bonds</em><em> (also called triple covalent) between two atoms of nitrogen because each nitrogen atom needs three electrons to fill its outermost shell</em> (Lumen Learning)."

I hope this helps! Have a great day!

7 0
3 years ago
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Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.
Travka [436]

The given question is incomplete as tiles are not given, however, the complete question is as follows:

Match the description of each organism to the appropriate category. Not all numbered options will be used. (Please match 1 number to 1 letter).

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2. lives in a marsh environment and aids in biodegradation

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4. lives within the blood of another organism and causes disease

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A. parasitic fungus

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Answer:

The correct answer is -

A) Parasitic fungus-  4

B)  Mutualistic fungus - 5

C) Saprophytic fungus- 2

Explanation:

Fungi are organisms that are characterized by an organism that is microscopic, heterotrophic, and grows as long threads-like structures known as hyphae. These organisms can be divided into-

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The mutualistic fungi - the group of fungi that lives mutually and obtains nutrients and provides benefit to the host.

The saprophytic fungi - fungi group that lives on the dead organic matter and decomposes it known as saprophytic fungi.

3 0
3 years ago
What are the limits to cell growth?
azamat

Answer:

so surface area is the limit

Explanation:

As a cell grows, its volume increases at a faster rate than its surface area. Therefore, the volume of a cell is limited by its surface area, which is directly related to its ability to permeate required materials through its membrane. Surface area limits the diffusion of nutrients into the cell.

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Answer:

I think Spindle Fibers

7 0
3 years ago
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