Answer:
True
Explanation:
for a substance to be a mineral it must be a naturally occurring inorganic crystalline solid that has a characteristics chemical composition and Crystal structure
If later is was 100 million years ago, later b would be 200 million years ago (because it is 100millions years prior to a). And therefore layer c must b 300 million years ago.
<span>a)Stem cells must always be provided by a donor who is financially compensated.</span>
Answer:
Explanation:
Wild guess. Photosynthesis
