Which of the following is an appropriate unit to measure large distances across the universe? an astronomical unit a kilometer a light year a mile

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.

As a result of wildfires, in grasslands. a) tree growth increases b) grass growth increases c) soil quality decreases d) invertebrate variety decreases

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?