In human lungs, where does gas exchange
occur?
a. the pharynx
b. the alveoli
c. the trachea
d. the bronchioles
e. more than one of these
B
Biology & Microbiology
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A(n) ________ is an enlarged lymph node that appears during cases of the plague.
Fill in the blank(s) with the appropriate word(s).
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_______ is the lipoprotein insulating material present in multiple layers of plasma membrane wrapped around some axons.
A. Ranvier B. myelin C. microglian D. axonin
Biology & Microbiology
The water molecule is formed from two hydrogen atoms and one oxygen atom. Which type of force attracts one water molecule to another?
A) ionic bond B) hydrogen bond C) polar covalent bond D) nonpolar covalent bond
Biology & Microbiology
Which of the following atmospheric gas is changing the global climate?
A. ozone B. water vapor C. carbon dioxide D. hydrogen E. oxygen
Biology & Microbiology