In which of the following can a change be directly observed? a. alleles b. genotypes c. phenotypes d. mutations

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

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt