Exam 22: Development and Aging

The afterbirth refers to the

The egg from a ___ has been observed to form a gray crescent after fertilization.

Which of the following is an advantage of breast feeding?

Generally only one sperm fertilizes an egg because

Genes that determine how segments develop during morphogenesis are termed ____ genes.

The hormone ____ from the ____ causes mammary lobules in the breast to contract causing milk to flow.

In experiments with the roundworm Caenorhabditis elegans,researchers were able to trace the development of the generalized zygote into the specialized cells of the adult roundworm,a schematic that formed a(n)

The statement 'a child is more closely related to its mother than to its father' is

As we become older,the

The _____ develops into the fetal portion of the placenta.

The neural tube of vertebrates develops during morphogenesis of the nervous system by the

The blastocoel is formed during the _____ stage of development.

From months 5 to 7,a fetus is covered in a fine down called

Describe the 6 steps involved in fertilization of an egg,starting with the sperm reaching the egg.

The _____ is responsible for gas-exchange in the egg of a chicken.

Which association is incorrect?

What is the difference between a skin cell and a stem cell?

List the three embryonic germ layers and indicate a structure that forms from each.

During which stage of birth is the placenta delivered?

The human blastocyst