Describe in two or more complete sentences which organs are involved in your immune system and how they fight off infections.

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.

What characteristic make legumes a good food source for food insecure populations

This diagram shows how seed plants are grouped. which is the missing label? bryophytes angiosperms pteridophytes monocots