The width of the pyramid at each trophic level represents the number of organisms at that level. True or False?

How does biodiversity lead to sustainability in an ecosystem

The first synapse in the olfactory pathway is found in the

Describe the movement of water across the cell membrane of a cell as osmosis, and explain its importance.

What is a radical in biology?

The cells of a young elephant are the same as the cells of an adult elephant even though the adult elephant is much larger. What happens to the cells of the young elephant during it's growth? a.

How do scientists put a gene of one organism into another?

A population of birds lives on a small island. Another population of the same species lives on the mainland. The distance between the island and the mainland is too great for birds to fly back and forth.

Which term best describes the interval between the birth of the newborn and the return of the reproductive organs to their normal nonpregnant state? A. Involutionary period because of what happens to the uterus B.

The way you breathe and the way your heart beat changes when you run fast. Describe both these changes. (Extended writing)

If you play a low note on an instrument, you know that the sound wave has what?