The embryonic germ layer of tissue in animals that develops into the skin and nervous system is the

A. mesoderm.
B. protoderm.
C. ectoderm.
D. pachyderm.
E. endoderm.


C. ectoderm.

Biology & Microbiology

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Their next two steps, in order, should be _____

A) use of a fluorescent probe for the gene sequence, then electrophoresis B) electrophoresis of the fragments followed by autoradiography C) electrophoresis of the fragments, followed by the use of a probe D) use of a ligase that will anneal the pieces, followed by Southern blotting E) use of reverse transcriptase to make cDNA, followed by electrophoresis

Biology & Microbiology

The phospholipids of a cell membrane are arranged into a ________.

What will be an ideal response?

Biology & Microbiology

Dominant genes are always expressed phenotypically?

a. true b. false

Biology & Microbiology

The cell membrane of the red blood cell will allow water, oxygen, and carbon dioxide to pass through. Because other substances are blocked from entering, this membrane is called:

A. perforated B. semi-permeable C. non-conductive D. permeable

Biology & Microbiology