Which term refers to a type of trait that is usually expressed only when an organism has two identical alleles for the trait? a) dominantb) heterozygousc) homozygousd) recessive

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

Is there any solid scientific evidence that humans have been cloned?

Is this mrna or rna need need the answer in a hurry