Which brain structure plays a central role in homeostasis?

a. thalamus
b. hypothalamus
c. cerebrum
d. brain stem
e. cerebellum


ANSWER: b

Biology & Microbiology

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RNAi probably evolved as a mechanism to:

A. aid molecular biologists to experimentally knockdown gene expression. B. catalyze RNA-dependent DNA synthesis. C. suppress infection by RNA viruses. D. generate cell-specificity for certain mRNAs.

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The molecule that carries the message of the gene from the nucleus to the ribosome is 

A. DNA. B. tRNA. C. mRNA. D. rRNA.

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One of your closest fish relatives is the coelacanth. Where is its equivalent to your forearm?

A. The pelvic fin lobe B. The operculum C. The claspers D. The gill arch extensions E. The pectoral fin lobe

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Which of the following is not considered to be part of an innate immune response?

a. phagocytic cells e. inflammation b. fever f. complement activiation c. histamines g. antigen-presenting cells d. cytokines h. none of these

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