A control group is _____

a. a set of individuals that have a certain characteristic or receive a certain treatment
b. the standard against which an experimental group is compared
c. the experiment that gives conclusive results


B

Biology & Microbiology

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These are cell adhesion proteins that some cells use in the process of differentiation during development.  

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Since birds descended from one group of terrestrial dinosaurs, the grouping that includes only terrestrial dinosaurs is

____.

a. anagenetic b. analogous c. monophyletic d. polyphyletic e. paraphyletic

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A muscle that decreases the angle between two bones at a joint is called a(n)____

a. flexor b. agonist c. depressor d. antagonist e. extensor

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________ orbit around the nucleus of an atom

Fill in the blank(s) with correct word

Biology & Microbiology