In which of the following ways does species richness affect ecosystem function? (Check all that apply.)A) Low species richness can contribute to ecosystem stability.B) High species richness can increase ecosystem resistance to drought.C) Low species richness can make an ecosystem more susceptible to invasive species.D) High species richness reduces overall ecosystem productivity.
What will be an ideal response?
B, C
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A) 10% B) 25% C) 33% D) 50%
How efficient is cellular respiration in extracting the energy stored in the bonds of glucose?
a. 20 percent b. 30 percent c. 40 percent d. 50 percent e. 80 percent
The oral contraceptive pill contains
a. estrogen only. b. estrogen and progesterone. c. estrogen and follicle-stimulating hormone. d. follicle-stimulating hormone and progesterone. e. estrogen, progesterone, and follicle-stimulating hormone.
The eye is a warm, moist environment favored by many harmful bacteria. Nevertheless, eye infections are relatively rare. Why is this?
A) Tears contain the antibacterial enzyme lysozyme. B) The eyes are constantly exposed to UV light, which inhibits bacterial growth. C) Antibodies, particularly IgM, are secreted in abundance in the tears. D) The enzyme tearase inhibits bacterial growth.