Exam 43: Animal Development

In placental organisms, the of the embryo merges with the endometrial lining of the uterus to form the placenta.

diffuse(s) from fetal blood to maternal blood in the placenta.

The small, hollow ball of cells in early development is the zygote.

The process by which an organism proceeds from fertilized egg through adulthood is .

Homeobox genes determine the overall shape of the body and the location of its parts.

In a bird egg, the provides the watery environment in which the embryo develops.

genes code for transcription factors that regulate the transcription of other genes.

The placenta prevents pathogenic microbes such as HIV and chemicals such as alcohol from reaching the baby's bloodstream.

Suppose a pregnant woman took a drug that causes incomplete brain formation during fetal development. When must the woman have taken the drug for this effect to occur?

Longevity in animals appears to be most related to their cells' ability to repair damage to their own DNA.

In animals that undergo indirect development, the newborn has a similar body structure to that of the adult.

Which of the following is the result of gastrulation?

Which of the following occurs in the placenta?

The blastocyst implants in the endometrium about 7 days after fertilization.

-The function of structure 1 is to

As early as the month, as the brain and spinal cord grow, the fetus can demonstrate movement and respond to stimuli.

The is the baby's contribution to the placenta.

In humans, fertilization occurs in the

The last 7 months of pregnancy are devoted to

Amphibians, reptiles, and mammals pass through embryonic stages in which they have tails and webbed fingers and toes.