Most Devonian osteolepiforms had strong, stout fins that enabled them to crawl on the muddy bottom of shallow

pools.



a. True
b. False


ANSWER: True

Biology & Microbiology

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Match the second messenger on the left with the properties on the right.

A) activates protein kinase C B) opens sensory-associated ion channels C) can bind calmodulin D) glucose mobilization E) opens calcium channels 1) cAMP 2) IP3 3) DAG 4) calcium 5) cGMP

Biology & Microbiology

____ are responsible for separating

chromosomes during cell division.

a. Microfilaments. b. Intermediate filaments. c. Actin filaments d. Microtubules e. Microfibers

Biology & Microbiology

Which cells complete their maturation in the thymus gland?

a. T cytotoxic cells only b. T helper cells only c. B cells only d. Both T cytotoxic and T helper cells e. T cytotoxic cells, T helper cells, and B cells

Biology & Microbiology

The lowest temperature at which a microbe continues to metabolize is called its ____.

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

Biology & Microbiology