In which group did lungs first evolve?

a. cartilagineous fish
b. ray finned fish
c. lampreys
d. coelacanths
e. lungfish


B

Biology & Microbiology

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The fluid which bathes and nourishes the tissue cells is the

A. cytoplasm. B. lymph. C. blood. D. interstitial fluid.

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What percentage of the immigrants into your experimental populations have the A allele?

a. 50% b. 5% c. 0.5%

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What is the main difference between protists and bacteria?

a. Protists are unicellular, bacteria are multicellular. b. Bacteria have DNA, protists do not. c. Protists cannot cause infections, bacteria can d. Protists have a nucleus, bacteria do not e. Bacteria are always gram-negative, protists are gram-positive

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What three features are common to all respiratory systems?

What will be an ideal response?

Biology & Microbiology