Which one of these is NOT an example of pathogen entry via the parenteral route?
A) entry through a break in the skin caused by a cut
B) injection via the bite of an infected insect
C) infection of a hair follicle
D) injection of the pathogen via a contaminated needle
Ans: C) infection of a hair follicle
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During oogenesis meiosis results in _____
A) four equally sized cells that stop dividing in meiosis I B) two equally sized cells that are both typically fertilized C) two equally sized cells, but only one is typically fertilized D) two or three small cells and one large cell that develops further if fertilized
Because of fluctuations in the environment, such as depletion of food supply or an outbreak of disease,
a population may periodically experience a rapid and marked decrease in number of individuals, leading to a form of genetic drift called
a. a founders effect. b. migration. c. gene flow. d. natural selection. e. a genetic bottleneck.
Distinguish between cis- and trans-dominance
What will be an ideal response?
G protein-coupled receptors are the largest family of cell surface receptors. Each receptor passes through the plasma membrane how many times?
A. Seven times B. Three times C. Once D. Five times