Answer:
True
Explanation:
The species that went extinct could be a food source for another and that would possibly be detrimental to the chain.
Adenine and thymine
cytosine to guanine
hope that helped
<span>A) enzymes. Enzymes are what break down proteins. </span>
There was no life on Earth for the first billion years because the atmosphere was not suitable for life. Earth's first atmosphere had lots of water vapor but had almost no oxygen. Later, frequent volcanic eruptions put several different gases into the air.
