Question 7 of 10 multiple choice: select the best answer and click "submit." many ocean creatures make their shells out of calcium carbonate (caco3). this process is more difficult when the ocean ph is lower. why would greenhouse gas emissions harm these creatures? a. the concentration of salt in the water has decreased. b. calcium carbonate is a major greenhouse gas. c. the polar ice caps are made of freshwater. d. co2 acts as an acid when absorbed by the ocean.

The answer is obviously letter b.

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait.