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The development of____ factored into the development of complex organisms.


Ozone

Oxygen

Cyanobacteria

All of the above


The end of the Paleozoic Era was signaled by____.


The development of humans

Mass extinction of land and sea animals

The development of organisms with hard parts

Both a and b


Reptiles evolved from an ancestor of amphibians that developed a(n)____.


Egg with a strong outer shell that kept it from drying out

Hard set of teeth

Thick eyelid

Long tail

Verified Answer :

taskmasters

The development of Ozone, Oxygen, Cyanobacteria factored into the development of complex organisms. The correct option is the last option.

The end of the Paleozoic Era was signaled by mass extinction of land and sea animals. The correct option is the second option.

Reptiles evolved from an ancestor of amphibians that developed an egg with a strong outer shell that kept it from drying out. The correct option is the first option.

Answer:

D.

B.

A.

Explanation:

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