What part of the ice cores tells us what the atmosphere was like in the past? A. The water when the ice cores melt.
B. The ice crystals.
C. The rings of the ice core.
D. The air bubbles trapped in the ice cores.

Liquid water turns into water vapor at which step in the water cycle

Agroup of plant cells was exposed to radiation, which damaged the chloroplasts and caused them to lose function. if the mitochondria were unharmed, what would happen to the overall function of the plant cells? a. the cells would not be able to make food, but would be able to release energy from biomolecules. b. the cells would not be able to replicate dna, but would be able to break down waste. c. the cells would not be able to break down waste, but would be able to replicate dna. d. the cells would not be able to release energy from biomolecules, but would be able to make food.

What are 3 reasons that natural selection occurs