The three distinct cell layers that form in an embryo are the ectoderm, ________ and ________.

Fill in the blank(s) with the appropriate word(s).


endoderm and mesoderm

The three distinct cell layers that form in an embryo are the ectoderm, mesoderm and endoderm.

Biology & Microbiology

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Viruses that kill bacterial host cells during each cycle of infection are called ____

a. virulent bacteriophages b. enveloped viruses c. temperate bacteriophages d. phages e. nonvirulent bacteriophages

Biology & Microbiology

What is the name for the gap into which neurotransmitters are released?  

A.  gap junction B.  synaptic cleft C.  postsynaptic membrane D.  presynaptic membrane E.  impulse channel

Biology & Microbiology

The suffix -oma means _____

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Genetic goitrous cretinism is caused by lack of the enzyme to synthesize ____________________

from phenylalanine. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology