James took two pea plants, placing one in a dark closet and the other on a sunny windowsill. both are located in air-conditioned rooms. he then measured the growth of the pea plants after a week. which of the following best describes the purpose of this experiment? to determine the effect of air conditioning on plant growth to determine the effect of lack of water on plant growth to determine the effect of sunlight on plant growth to determine the effect of enclosed spaces on plant growth

Radioisotopes often emit alpha particles, beta particles, or gamma rays. the distance they travel through matter increases in order from alpha to gamma. each radioisotope has a characteristic half-life, which is the time needed for half of a sample of radioisotope to undergo nuclear decay. which quality is desirable for a radioisotope that is used for medical imaging of a specific organ? check all that apply. half-life of several years half-life of several days half-life of several seconds emission of gamma rays emission of alpha particles ability to be attached to a compound used by the body ability to pass through the body without being absorbed