Which of the following is the most effective in

protecting against sexually transmitted
diseases?
a. condoms
b. the Pill
c. douching
d. an IUD
e. the rhythm method


A

Biology & Microbiology

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Sewage treatment that involves horizontal flow in an agitated aeration tank is referred to as

A. trickling filter processing. B. activated sludge treatment. C. lagooning. D. endogenous respiration.

Biology & Microbiology

The white blood cells that are central to adaptive

immunity are types of a. neutrophils. b. macrophages. c. mast cells. d. eosinophils. e. lymphocytes.

Biology & Microbiology

Oxidative (aerobic) respiration transfers electrons to oxygen

What will be an ideal response?

Biology & Microbiology

A pond represents a(n) ________, while the minnows represent a(n) ________.

A. community; population B. ecosystem; population C. population; ecosystem D. ecosystem; community E. population; community

Biology & Microbiology