Which of the following is an example of an organism’s niche?
a. a tortoise that lives on the African savannah eating grasses and living in deep burrows
b. the thick mane of a male lion
c. the camouflage coloration of zebras as they stand in the shade of acacia trees
d. a flock of turkey vultures
A
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What is the purpose of ionic groups in the active sites of enzymes?
a. to alter the substrate in a way that favors catalysis b. to catalyze an acid/base reaction required for synthesis c. to promote the binding of substrates that otherwise would not fit d. to generate an electronic current to provide the energy for the reaction e. to increase the salt concentration required for the chemical reaction to occur
If an agent is transferred from an infected person to another person without an intermediate object, substance or space, it is said to be _____ transmission.
Fill in the blank(s) with the appropriate word(s).
Which of the following was the most recent to evolve?
A. angiosperms B. gymnosperms C. seedless vascular plants D. bryophytes E. green algae
A mountain range along the coast of a continent is located perpendicular to the prevailing sea breeze. Which one of the following describes an area where the rain shadow is located?
A. On the leeward side of the mountain where warm, moist air is descending B. On the windward side of the mountain where cool, dry air is rising C. On the windward side of the mountain where warm, moist air is rising D. On the leeward side, far inland from the mountain E. On the leeward side of the mountain where cool, dry air is descending