Dating to about 3.5 to 3 million years ago, the famous fossil "Lucy," found in northern Ethiopia, represents a member

of ____.



a. Homo habilis
b. Homo erectus
c. Australopithecus africanus
d. Australopithecus afarensis
e. Homo neanderthalensis


ANSWER: d

Biology & Microbiology

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Muscle relaxation requires ATP.

a. true b. false

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Sensilla are sensory hairs involved in taste and smell

____________________ Indicate whether the statement is true or false.

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The sequence Lys-Asp-Glu-Leu (KDEL) serves as an ER retention signal for proteins by binding to KDEL receptors that

a. hold the proteins in the rough ER. b. hold the proteins in the smooth ER. c. hold the proteins in both smooth ER and rough ER and prevent their transport to the Golgi apparatus. d. transport the proteins from the Golgi apparatus back to the ER.

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________ is the final product to be expelled from the body after the kidney has reabsorbed needed nutrients and water.

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

Biology & Microbiology