In terms of public health, the major lethal effect of smoking is ________

A) oral-facial cancer B) lung cancer
C) peptic ulcers D) cardiovascular disease


Answer: D

Biology & Microbiology

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The membrane potential is closest to the equilibrium potential for potassium at label _____

A) A B) B C) C D) D E) E

Biology & Microbiology

Birds that dive into the water from a height of 18 to 30 meters are called:

a. pelicans. b. albatross. c. tubenoses. d. boobies. e. puffins.

Biology & Microbiology

Which statement about eukaryotic chromosomes is not true?

a. They sometimes consist of two chromatids. b. They sometimes consist only of a single chromatid. c. They normally possess a single centromere. d. They consist only of proteins. e. During metaphase they are visible under the light microscope.

Biology & Microbiology

What is the major disadvantage of an exoskeleton?

A) It hardens only after an extended exposure to air. B) It does not provide effective support for muscles. C) It does not protect the internal organs. D) It must be periodically shed for growth to occur.

Biology & Microbiology