Which traits are characteristic of both single-celled and multicellular organisms? choose all answers that are correct. a. contain organs that them survive b. have metabolism c. can reproduce a whole colony in a matter of hours d. have ability to reproduce

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Ineed to know why d is the correct answer asap

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.