Scientists who study the behavior of animals in their natural setting are called

Average annual precipitation and are the two major features that define the biomes on earth.

Match each description to the appropriate biome. tropical savanna desert tropical rain forest taiga tundra has sparse vegetation and very cold temperatures located near the equator and contains trees that form dense canopy layers is very hot and dry, and has plants that need little water has cold winters, heavy snowfall and is dominated by conifers has warm temperatures and is dominated by grasses

The cluster of developing cells from conception until birth is called an