Harriet, a student nurse, was at first extremely uncomfortable at the sight of blood. after a month of working in the emergency room, she is no longer upset when confronted with serious injuries. harriet has undergone

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity