Which diseases are associated with the use of tobacco products? Check all that apply.
_____ lung cancer
_____ cardiovascular disease
_____ emphysema
_____ esophageal cancer
_____ stomach cancer
__X__ lung cancer
__X__ cardiovascular disease
__X__ emphysema
__X__ esophageal cancer
_____ stomach cancer
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The urogenital system refers to the
(a) urinary and reproductive systems. (b) urinary and excretory systems. (c) reproductive system. (d) external genitalia.
What is the process involved with nitrifying bacteria?
a. nitrite ? nitrate b. nitrate ? nitrite ? nitrogen gas c. nitrate ? ammonia d. urea ? ammonia e. nitrogen gas ? ammonia
The structure of a DNA molecule is analogous to a _____
a. paper clip b. ladder c. fork d. rope e. coiled spring
When sampling a species that has clumped distributions, which approach listed below is best?
A) sampling at random locations B) counting every individual C) calculating an ecological density D) assuming a uniform distribution