Why is indoor air pollution a serious health hazard in some developing countries?
a. the burning of coal releases significant amounts of particulates into the air.
b. people smoke more in developing countries.
c. many homes rely on indoor burning of wood or dung without proper ventilation.
d. most houses in these countries are well insulated, increasing household exposure to radiation?

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