Which of the following is not a tool used by

animals to migrate?
a. Star position.
b. The Earth’s magnetic field.
c. Olfactory landmarks.
d. Sun position.
e. All of these are used.


E

Biology & Microbiology

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Which system(s) control digestion?

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Human white blood cells are often multinucleated (in other words, have more than one nucleus). How many chromosomes would be present in a white blood cell with two nuclei?

A) 46 B) 92 C) 184 D) It varies depending on gender.

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To maintain guard cell turgor, which of the following must occur?

A. Potassium ions are pumped out. B. Energy is constantly expended. C. Water exits by osmosis. D. Stomata take up oxygen. E. Transpiration occurs.

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Leptospira interrogans exits the body in (feces/aerosols/urine).

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology