Exam 50: Animal Development

Morphology refers to the ____ of an organism.

When the optic vesicle contacts overlying ectoderm, developmental events are induced, leading to ____ in the developing lens.

The outer single layer of cells of the blastocyst is called the _____.

As embryonic cells divide during cleavage, the daughter cells ____.

In bird embryos, the pathway for cell migration into the blastocoel is formed by the ____, while in frog embryos, the pathway for cell migration into the blastopore is formed by the ____.

The final body form of an animal is generated as differentiated cells settle into their appropriate sites; this process is called ____.

As cleavage divisions continue, the ball or layer hollows out to form the ____.

Cells capable of producing all the various types of cells of the adult are called ____ cells.

At the cellular level, the development of an adult animal from a fertilized egg involves ____.

Maternal blood mixes directly with the embryo's blood in the placenta.

Explain how the SRY gene induces the development of testes and the male reproductive tract.

Human development ____.

Cleavage-stage cells are called ____; they initially form a solid ball or layer called a ____.

Determination ____, while differentiation ____.

The material in the gray crescent of a frog embryo is necessary for normal development.

The pharyngeal arches contribute to the formation of the ____.

Cell differentiation occurs due to ____.

Uterine contractions ____.

The nervous system structures develop from the ectoderm.

What are cadherins?