Answer: a. greatest at the equator and drops as you move farther north or south
Explanation: Biodiversity is not evenly distributed on Earth. Terrestrial biodiversity is normally greater near the equator, (is richest in the tropics) and it lowers as you move towards the poles.
Tropical forest biodiversity cover less than 10 percent of earth's surface, and contain about 90 percent of the world's species.
Tundras are very cold and harsh. They have no trees and little vegetation, although there may be wildflowers in the summer, due to indirect sunlight. There is barely sufficient rainfall and the climate is often windy. Animals include caribou, birds, polar bears, wolves and arctic foxes (to name a few).
Samarkand is smaller in size than Tashkent.
