Embryonic Development

The animal's digestive tract forms from the _______.

• endoderm

• mesoderm

• ecotoderm

• protostome

The embryo layer that forms the skin and nervous tissue is the _____.

• endoderm

• mesoderm

• ectoderm

• deuterostome

The ectoderm is on the outside of the developing embryo.

• True

• False

Tags

NGSS.HS-LS1-4

The innermost layer of the blastocyst is the

• endoderm

• gastrula

• ectoderm

• mesoderm

The middle layer of the blastocyst is the

• endoderm

• ectoderm

• mesoderm

• deuterostome

If the opening in the gastrula turns into the organisms mouth then it must be a

• deuterostome

• protostome

• human

• dog

Animal with a mouth that does NOT develop from the opening in the gastrula.

• deuterostome

• protostome

• insect

• snail

Embryonic structure of an animal that consists of TWO cell layers

• blastula

• gastrula

• morula

• blastocyst

______ implants itself into the lining of the uterus.

• blastual

• gastrula

• blastocyst

• morula

Layer of cells that lines the gastrula

• endoderm

• ectoderm

• mesoderm

• protostome