Placoid scales are found on:

a. lungfish.
b. sharks.
c. ray-finned fish.
d. lob-finned.
e. snakes.


B

Biology & Microbiology

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A microbiologist obtained two pure isolated biological samples: one of a virus, and one of a viroid. The labels came off during a move from one lab to the next, however

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The genetic code is made up of codons consisting of

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During exercise, the skeletal muscles receive

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The main components of soil are

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Biology & Microbiology