Answer:
The diversity and variations between ecosystems that ultimately links to human existence
Explanation:
DNA stands for Deoxyribonucleic Acid, so it's an acid
Answer:
The correct answer is b. The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old.
Explanation:
The oldest one of them all is the hematite tubes, that are dated about 3.77 billion to 4.2 billion years and it's from a yet unknown bacteria.
Here is the definition
<span>
an unborn or unhatched offspring in the process of development.</span>
