What is the role of the ozone layer?
A) It reduces the amount of UV light that reaches Earth's surface.
B) It increases photosynthesis in Antarctic phytoplankton.
C) It increases the amount of sunlight that reaches the poles.
D) It increases the gyres.
E) It increases the levels of chlorofluorocarbons (CFCs) in the upper atmosphere.
A
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During this phase of the cell cycle the microtubules of the spindle fiber attach to the kinetochore:
A. Metaphase B. Prometaphase C. Telophase D. Anaphase E. Prophase
The above diagram is an example of
a. a closed circulatory system with one heart. b. an open circulatory system with one heart. c. a closed circulatory system with a threechambered heart. d. an open circulatory system with a twochambered heart. e. a closed circulatory system with a fourchambered heart.
At the Beautiful Mutants Flower Shop, a variety of unique mutant plants are sold. What would be the best flower to give to a friend who is allergic to pollen?
A. "Beautiful Innocence" -- a plant with a mutation in the class C genes. B. "Suspense" -- a plant with a mutation in the LEAFY gene. C. "Superhunk" -- a plant with a mutation in the class A genes. D. "Clockface" -- a plant with a mutation in the CYCLOIDEA gene.
Joseph Lister reduced the incidence of wound infections in health care settings by using chlorinated lime water
Indicate whether the statement is true or false