In what type of organism can we readily observe evolution?

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Which is an example of a decomposer? a. bear b.algae c.grass d.bacteria d bacteria

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.