The osmoregulatory/excretory system of an earthworm is based on the operation of _____

A) protonephridia
B) metanephridia
C) Malpighian tubules
D) nephrons


B

Biology & Microbiology

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The motor division of the PNS in a vertebrate can be divided into

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Changes in sediment distribution can be attributed to all except:

a. currents. b. burrowing animals. c. feeding activity of predators. d. temperature - salinity shifts.

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Why is it important to sequence bacterial genomes?

What will be an ideal response?

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Which of these humans is the "fittest" as far as natural selection is concerned?

A) a person who lives to the age of 105 and has two children B) a very popular film star who is still alive, is very rich, and has three children from three spouses C) a person who lives to the age of 110 and has no children D) a person with seven children who is killed in an automobile accident at age 40

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