Some microbes secrete small molecules that induce other microbes to settle nearby. When a certain number of individuals have assembled, the chemical signal is strong enough to induce the aggregation to respond collectively to stimuli. This process is called

A. bioremediation
B. mutualism
C. conjugation
D. quorum sensing
E. mass-settling


D. quorum sensing

Biology & Microbiology

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Which of the following will decrease blood pressure?

a. increasing heart rate b. increasing stroke volume c. increasing vessel diameter d. increasing stress

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Four of the five answers listed below contribute to the semen. Select the exception

a. vas deferens b. prostate c. seminal vesicle d. bulbourethral gland e. seminiferous tubule

Biology & Microbiology

Eugenics is the attempt to improve the human species by ____________________. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

Plasma that leaks out of the blood in the capillary beds is returned to the venous circulation by

A) the lymphatic system. B) the small intestine. C) the inflammatory response. D) suppressor B cells.

Biology & Microbiology