Perhaps the best evidence ever documented of natural selection operating on a heritable trait concerns a type of moth, Biston betularia, found in England. Prior to the Industrial Revolution, these moths were .

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

Explain why phospholipid molecules form a bilayer. (3 marks)

Which could be a pathway of food through an ecosystem