Plants produce oxygen which animals use. Animals produce carbon dioxide which plants use. Predict the most likely outcome if airborne pollution blocked the sun’s rays so significantly that the percentage of living plants was decreased by 95%. A. Plants would quickly evolve to consume a mixture of oxygen and carbon dioxide

B. Animals would quickly evolve to begin using carbon dioxide

C. The atmosphere would fill with carbon dioxide, and animals would begin to die.

D. The atmosphere would fill with oxygen, and animals would begin to die.

it creates acid rain

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.