The diagram shows an energy pyramid. Which two sentences best explain what happens to energy in this ecosystem?

A. Each organism gains energy from its surroundings.
B. Energy is gained as it flows down the pyramid.
C. Each organism loses energy as body heat.
D. Energy is lost as it flows through the links in a food chain.

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?