Which best describes the energy of activation?

a. A type of exergonic reaction
b. A type of endergonic reaction
c. The energy required to break existing bonds
d. The catalysts needed to raise a reaction's rate
e. The enzymes required to lower a reaction's rate


c

Biology & Microbiology

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. When performing an experiment, what is another word used to describe the treatment?

a. hypothesis b. control c. variable d. data

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What is the function of erythrocytes?

a. carry oxygen b. form clots c. fight off infections d. produce blood cells e. secrete erythropoietin

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Which of the following elements favors

fossilization?

a. death in an isolated area b. rapid burial c. a bony skeleton d. all of these elements favor fossilization e. one or more of these is an element that does NOT favor fossilization

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Antibody genes

A) contain both constant and variable regions. B) are formed by cutting and splicing DNA in B cells during development. C) are made from two heavy and two light chains, each of which has a variable region. D) each recognize one antigen and are the only antibody made by their B cell. E) All of these

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