Answer:
(1)
Explanation:
there are different divisions of the spinal cord but as a whole there are 31 segments
Stem cells grown on a hard, rigid surface are biased into differentiating into a bone cell lineage. <span />
<span>The number of snowshoe rabbits would decrease, and the number of foxes would decrease.</span>
Answer:
B
Explanation:
I believe it is meiosis because there are two parts in which it helps to increase genetic variety. In prophase 1, the genes cross over, which increases the variety. Also, the chromosomes are assigned randomly in Metaphase 1.
Hope this helps:)
Based on the description of events, being that the lizard population appears to increase as soon as the snake population decreases, it appears that the snakes prey on the lizards. This suggests that the snake is a keystone species. A keystone species is one that has a dramatic effect on maintaining the balance of an ecosystem. As soon as the snake population decreases, major changes occur to the ecosystem, such as the lizard population increasing.
Therefore, the answer is D: <span>The snake is a keystone species in the ecosystem.</span>