2 and 3 please HELP!!

Which of the following conclusions can be drawn

Modern whales developed their traits through natural selection what occurs during the process of natural selection

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .