The answer is B. Cross-pollination occurs when pollen fertilizes female egg cells on the same flower.
Without the greenhouse effect, there would be more ice on Earth’s surface. The answer is B.
Mixture should be the answer.
That's true. There is little variety among organisms found in pools, pounds and lakes. Despite that fact that many ponds are seasonal, lasting just a couple of month (for exemple sessile pools) while lakes can exist for more than hundred years. Lakes and ponds have limited species diversity because they are often limited from each other and from other water sources like rivers, seas and oceans.
