Horizontal gene transfer is the transfer of genes between

A. two chromosomes in a nucleus.
B. organelles within a cell.
C. cells within a multicellular organism.
D. different species, either prokaryotic or eukaryotic.


D. different species, either prokaryotic or eukaryotic.

Biology & Microbiology

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Ca+ ion channels are found:

A. only at the axon terminal membrane. B. only along the terminal ends of the dendrites. C. throughout the length of the axon. D. throughout the entire neuron. E. only at the axon hillcock.

Biology & Microbiology

Animals that are likely to be severely affected by DDT include:

a. pelicans. b. jellyfish. c. anchovies. d. mussels. e. copepods..

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Organize the terms into the proper order of levels of organization:

a. organ system b. cell c. body d. organ e. tissue

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What happens to the inner diameter of the walls of the respiratory tract as it moves down from the upper conducting zone to the lower respiratory zone?

A) increases B) thins C) decreases D) no change E) thickens

Biology & Microbiology