Would an asteroid impact cause a mass extinction or a background extinction? Why?

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

This is so important ugh its 25 points

What are the 3 types of artificial cloning