An organism, Jimsonweed, a common plant in New Jersey, has 12 chromosomes in its body cells. How many chromosomes will an egg cell of this plant have? * A. 6 chromosomes
B. 12 chromosomes
C. 18 chromosomes
D. 24 chromosomes

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.

A(n) is a molecule influences the way that a molecule reacts.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above