b. the ocean floor is not spreading
c. none of the ocean floor is more than about 180 million years old
d. most of the ocean floor is more than 180 million years old
Answer:
The Answer Is C.
Explanation:
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The answer is 2 raccoons per square meter.
The math is very clear. It can be solved using proportion.
If 20 raccoons live in 10 square meters, how many of them will live in 1 square meter:
20 raccoons : 10 m² = x raccoons : 1 m²
⇒
⇒ x =
⇒ x = 2
So, a population density is 2 raccoons per square meter.
Ans. Mitosis.
Mitosis is a process of cell division, which involves formation of two daughter cells from a parent cell having same genetic constitution as present in parent cell. It plays role in growth, development, and repairing of damage tissue.
After fertilization, a diploid, single-celled zygote is formed, which goes for mitosis, make thousands of cells and develops into fetus, which later develops into an adult animal.
Thus, the mechanism by which a diploid animal grows after fertilization is 'mitosis.'
b. tells us about many other species.
c. contributes to medicine and agriculture.
d. provides humans with resistance to disease