Hey guys um i found this crystal but i am not sure what it is. any help?

What does gradualism and punctuated equilibrium have in common

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

Nerve cells are specialized to respond to stimulitrue or false?