Amphibians were the dominant animal life during the ________ period.

A. Devonian
B. Jurassic
C. Silurian
D. Carboniferous
E. Cambrian


Answer: D

Biology & Microbiology

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In a given chemical reaction, if the free energy of formation is known for all of the reactants and each of the products, the change in free energy can be calculated for the reaction

Indicate whether the statement is true or false.

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Where would one expect to find the most telomerase?

A. male germ cells that give rise to gametes B. skin cells from a 60-year-old individual C. skin cells from a 2-year-old individual D. a nerve cell from a 60-year-old individual E. a nerve cell from a 2-year-old individual

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The two chromatids of each replicated chromosome must separate from one another and segregate during

A) mitosis. B) meiosis I. C) meiosis II. D) both mitosis and meiosis I. E) both mitosis and meiosis II.

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In some cases, inhibitors or activators of

enzyme-catalyzed reactions act by a. binding to the substrates. b. affecting the supply of ATP. c. reversibly binding to an enzyme's allosteric site. d. reducing or increasing the concentration of enzymes. e. binding to the products

Biology & Microbiology