Which of the following has increased as a direct result of stratospheric ozone depletion?
a. CO2
b. UVB
c. CFCs
d. nitrous oxides
e. sulfur oxides
b
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In 1665, ________ used a microscope that he had built to examine thin slices of ________. While examining this material, he observed tiny compartments that he called cellulae.
A) Theodor Schwann; animal tissue B) Robert Hooke; cork C) Antonie van Leeuwenhoek; sperm cells D) Robert Brown; plant material E) Rudolf Virchow; collagen
What term describes a relationship in which two species have a prolonged close association?
a. symbiosis b. commensalism c. mutualism d. predation e. parasitism
Continuously variable traits typically have a(n) ________, [two words] otherwise known as a "bell-curve."
Fill in the blank(s) with correct word
Select two classes of HIV drugs, and fully explain how they work. Can they cure HIV?
What will be an ideal response?