Exam 42: Animal Development

In blastulas, if cells from an area that would normally become skin are transplanted into an area that would become nervous system, the transplanted cells will become nervous system. True or False?

In the placenta:

A ________ is a fertilized egg.

The formation of the embryonic tissue layers occurs during ________.

How is blood flow in the placenta maintained so that there is maximum opportunity for the exchange of materials while still keeping the mother's and baby's bloods separate?

Newborn animals that closely resemble the adults of their species undergo ________ development.

All amphibians, reptiles, and mammals pass through embryonic stages in which they have tails and webbed fingers. True or False?

How do undifferentiated cells "know" what to become?

The metamorphosis of a caterpillar into a butterfly is an example of:

Muscles and bones develop from the embryonic ________.

Blood cells form from structure:

The process through which a human embryo develops into an adult is called metamorphosis. True or False?

The proteins that bind to the DNA near regions where gene transcription begins are called:

A mad scientist decides to start combining embryos and see what develops. He takes bits from the blastula of a frog with blue skin and transplants them into the blastula of a yellow-skinned frog. The embryo develops blue cells in its brain and spinal cord. The scientist must have transplanted the cells into the:

In placental organisms, the _______ is the fetal contribution to the placenta.

The cells of an aging animal function less efficiently because:

Cellular differentiation depends on which genes are expressed in the cell. True or False?

Homeobox genes determine the overall shape of the body and the location of its parts. True or False?

What is the main purpose of the last seven months of pregnancy?

The fluid the embryo floats in is produced by structure: