Trichoplax adhaerens has no nerve cells, but

scientists have discovered
a. genes that encode signaling molecules.
b. a response to harsh chemicals.
c. movement toward a food source.
d. adherence genes.
e. none of these.


Answer: a

Biology & Microbiology

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Reproductive isolating mechanisms

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Contractions of the dome-shaped __________ and the intercostal muscles between the ribs alter the volume of the

thoracic cavity during breathing. Fill in the blank(s) with the appropriate word(s).

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A grouping of three nucleotides code for one amino acid

__________________ Indicate whether the statement is true or false.

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