Exam 50: Animal Development

Normally, gestation lasts for approximately ____ weeks in humans.

Most of the mRNA and protein molecules in the zygote are from the ____ because ____.

In sea urchins, the primary mesenchyme cells eventually become the ____.

How does the amount of yolk relate to the nourishment of the organism?

In an egg, the ____ pole typically gives rise to surface structures and the anterior end of the embryo, while the ____ pole gives rise to internal structures, such as the gut and the posterior end of the embryo.

Which event occurs in a human fetus with the XX combination of sex chromosomes?

Which group of organisms has a pattern of gastrulation that is the most similar to humans?

Yolk, when unequally distributed in the egg cytoplasm, is most commonly concentrated in the ____ half of the egg.

During frog gastrulation, cells of the ____ of the blastopore control blastopore formation.

The epidermis of the skin and the lens, cornea, and retina of the eye   originate from the ____, while the lining of the respiratory tract originates from the ____.

Apoptosis is ____.

Place the cellular processes responsible for animal development in the correct order.

After childbirth, ____ in the mother.

Whole-cell movements involve the coordinated activity of ____.

In vertebrates, the central nervous system develops directly from the ____.

A human embryo is first considered to be a fetus at ____ weeks.

Which group of adult tissues is derived from the mesoderm?

Describe the experimental evidence for the selective adhesion property of cells.

Before zygotic genes become active, the stages of animal development are directed by the ____.