c. because only male repoduce sperm
Answer: C. there is more silicon than calcium at the surface of the earth
Explanation:
The layer of the sun can only be seen during a solar eclipse is corona
the breakdown of chlorophyll reveals the carotenoid pigments of a leaf.
I hope this helps!
I looked up your question just now and found this sight that has plenty of answers in it. https://www.britannica.com/place/Appalachian-Mountains
Hope this helps.
