During previous flu seasons, small variations in the influenza virus resulted in the immune system's inability to full recognize and respond to flu exposure. As a result, the vaccine was less than 30% effective. This is an example of ________.
A. the founder effect
B. antigenic shift
C. antigenic drift
D. artificial selection
Answer: C
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Which pairing of nerves and functions is part of the peripheral nervous system?
a. somatic nerves; flight-fight response b. autonomic nerves; control skeletal muscle c. autonomic nerves; control internal organs d. parasympathetic neurons; prepare body for danger e. sympathetic neurons; housekeeping tasks in the body
Drugs that target the plasma membrane are able to do so because
A. they contain a lipid part that enables them to act as a detergent. B. they are able to denature the membrane-associated proteins, creating pores thereby disrupting the integrity. C. they act as enzymes to break down the phospholipids. D. they target the phosphate group on the phospholipids, breaking down the bilayer.
Sara is 5 ft 4 in. tall and weighs 115 lb. Katy is 5 ft 10 in. tall and weighs 127 lb. They both have a BMI of 18.5. How can they have the same BMI? What is the value of knowing the BMI?
What will be an ideal response?
Filtering of blood and recycling of dead red blood cells are functions of the:
A) liver. B) spleen. C) pancreas. D) kidneys.