Why do hormones cause changes only in specific body organs? a. a hormone is carried to a specific location by tiny tubes b. a hormone interacts only with target cells, which fit together with that hormone. c. a hormone is produced only in the location where it is needed. d. a hormone works only through negative feedback.

Which of the following systems in absorbing oxygen and releases carbon dioxide

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

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells