Full Embryonic Development Test

The middle germ layer is called _____.

• endoderm

• mesoderm
• ectoderm

• mesoglea

A zygote goes through mitosis and turns into a hollow fluid filled ball of cells called a ____.

• blastula

• large zygote

• gastrula

• blastocoel

Tags

NGSS.HS-LS1-4

NGSS.HS-LS1-2

During embryonic development, when the hollow ball of cells folds in and becomes a sac with two layers and a hole at one end, it is then called a ______.

• zygote
• gastrula
• blastula
• blastopore

Check all that apply to the empty space in the blastula.

• called blastocoel

• called blastopore

• called gastrula

• may turn into the coelom

• may turn into a mouth

Check all that apply to the opening of a gastrula.

• may eventually turn into an anus

• called blastopore

• called blastocoel

• may turn into a coelom

• may eventually turn into a mouth

The outermost germ layer in the embryo is called the ____.

• endoderm
• ectoderm
• mesoderm
• blastocoel

Tags

NGSS.HS-LS1-4

The innermost layer of the embryo is called the ____.

• ectoderm
• endoderm
• mesoderm
• blastula

Tags

NGSS.HS-LS1-4

Check all that apply to diploblasts.

• 2 germ layers

• 3 germ layers

• can be protostomes or deuterostomes

• can be coelomates, pseudocoelomates, or acoelomates

• have one opening that serves as both an anus and a mouth

Which is true of pseudocoelomates:

• They have no open cavity at all - it has been filled with mesoderm.

• They have an open cavity but it is only lined with mesoderm on one side.

• They have an open cavity that is lined with mesoderm on both sides.

Check all that apply to protostomes.

• mouth develops 1st (from the blastopore) and anus forms later

• anus develops 1st (from the blastopore) and mouth forms later

• protostomes only have a mouth

• protostomes only have an anus

• always triploblastic animals