________ can vary between strains of an organism depending on the ability to adhere, colonize, and invade a host
a. Attenuation
b. Virulence
c. Disease
d. Infection
Answer: B
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Which of the following accounts for vision loss in sufferers of glaucoma?
A. intraocular pressure buildup due to poor drainage of the aqueous humor B. loss of photoreceptors in and around the fovea C. protein accumulation in the lens D. detachment of the retina from the outer part of the eye E. poor control of extraocular muscles
Thermoregulation depends on monitoring of blood temperature. What structure acts as the mammalian temperature sensor?
A. hypothalamus B. peripheral blood vessels C. adrenal medulla D. anterior pituitary gland E. thyroid
What are some challenges land plants face compared to life in the water?
A. Obtaining resources from the air and soil instead of from water B. Obtaining and retaining moisture C. Staying upright against the pull of gravity D. All of the above are challenges faced by land plants.
Which of the following is true of the adrenal medulla?
1.It controls sodium and water reabsorption in kidneys. 2.It releases norepinephrine into the blood. 3.It secretes sex hormones. 4.It decreases cortisol level in the blood.