How do geologists know that earths core is made up of two parts , answer as soon as possible that would be great : )

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

According to this food web which of the following would be considered primary consumers

Which of these parts of the membrane large moecules pass through it ?