Help me y’all omg ah Please

Which describes radioactive decay of a substance

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

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.