Question

Select the correct answer.

A keystone species has a relatively__ population in its ecosystem.

large

small

endangered

dominating

Submit

Suppose two pieces of ice are pushed slowly together. What might happen to the edges of the pieces?

Most chlorophyll is found in the green colored organelles called the mitochondria

Why do humans usually selectively breed organisms? A. They cross 2 parents with desirable traits because they want offspring with traits similar to those of their parents. B.

Which is an example of an ecosystem? A. a river B. the sun C. your body

Types of soil erosion

Match each product of pyruvate metabolism with the condition under which it is produced.

Which of the following best describes calcitonin? A. It's released by the adrenal medulla. B. It's released by the parathyroid gland. C. It functions to prevent hypercalcemia. D. It functions to prevent hypocalcemia.

Smooth muscles are slow to relax and slow to contract. explain why this is and why this is important.

In industrialized nations, childhood diseases have declined dramatically during the past half-century, largely as a result of

Where do greenhouse absorb radiation from?