Tubal ligation causes sterility because ____
a. eggs are no longer produced
b. the endometrium is unable to form
c. sperm is unable to enter the female reproductive tract
d. sex hormones are no longer produced by the ovaries
e. eggs are unable to travel through the oviducts to the uterus
ANSWER: e
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Which partially acid-fast, gram-positive, and branching filamentous bacteria appear dry and white to creamy to orange with rhizoid edges on routine agar and are urea-positive and resistant to lysozyme?
a. Tsukamurella b. Gordonia c. Actinomadura d. Dermatophilus
Organisms that require gaseous oxygen for metabolism are referred to as
A. facultative aerobes. B. obligate aerobes. C. facultative anaerobes. D. microaerophiles.
Which of the following is a characteristic of facilitated diffusion (passive transport) of a molecule across a membrane?
A) Its rate is higher than that of simple diffusion of the molecule. B) It is highly specific for the molecule being transported. C) The direction of transport is determined by concentration and/or electrochemical gradients. D) The rate of transport is saturable. E) All of the above are true.
Competition among individuals of the same species is referred to as ________ competition
Fill in the blank(s) with correct word