Down syndrome can occur: a. as a result of translocation during mitosis. b. most frequently in the offspring of men under the age of 40. c. most frequently in the offspring of women under the age of 40. d. because of nondisjunction, which yields an extra chromosome.

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.