Which statement best describes how plants and animals MOST affect oxygen levels in Earth's atmosphere? A.
Plants add oxygen through photosynthesis and animals remove oxygen through cellular respiration.
B. O Plants add oxygen during decomposition and animals remove oxygen during cellular respiration.
C.
Plants remove oxygen through cellular respiration and animals add oxygen during decomposition.
D.
Plants remove oxygen during photosynthesis and animals add oxygen during decomposition.

Determine if the following statement is true or false. if true, choose true. if false, choose the rewording that is true. according to the law of independent assortment, alleles for each gene are inherited together so that they always stay together. according to the law of independent assortment, offspring express a combination of their parents' traits. according to the law of independent assortment, alleles for a characteristic split during meiosis and combine during fertilization. true according to the law of independent assortment, alleles for each gene are inherited independently so that no two alleles stay together.

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.

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight