What role does molecular evidence play in determining how closely two species are related to each other?

Which codon is the code for the amino acid histidine (his)?

In sweet pea, gene c is responsible for color production and gene p is responsible for the purple color pigment. both of them are located on two different loci on different chromosomes. the flowers will be purple only when the plant has the genotypes as c_p_. no color will be produced with genotypes: ccpp, ccpp, ccpp, ccpp. thus, gene c controls the expression of gene p. what pattern of inheritance is exhibited here? a. pleiotropy b. epistasis c. multiple alleles

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above