Explain how smoking and drinking alcohol by males can affect the development of an embryo ? answer

Smoking and drinking can cause major birth defects. It can also cause the baby to be very sick when it is born, and have a near death experience.

depending on the amount of intake, the baby could also be born addicted to either one. It is very dangerous to drink or smoke during the development of a child.

Hope this is helpful!:

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

layer 3 is younger than layer 6.