Which of the following is usually the least disruptive (least serious) type of mutation if it occurs within a gene? a.) trinucleotide repeat b.) nucleotide insertion c.) single nucleotide substitution d.) nucleotide deletion

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.