Acid rain can be linked to an increased production of
a) carbon dioxide from plants
b) ozone in the atmosphere
c) sulfer dioxide from burning fossil fuels
d) oxygen from plants
Ans: c) sulfer dioxide from burning fossil fuels
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Membrane potential is determined by:
A. the number and types of proteins present in the plasma membrane of a cell. B. the difference in concentration of ions and charged molecules across the plasma membrane of a cell. C. the number and type of phospholipids present in a membrane. D. the concentration of cholesterol in a membrane.
What do you know about an inhibitor of the estrogen receptor? What other information is related to the question?
What will be an ideal response?
Four of the following are extraembryonic membranes of the amniote egg. Which one is the exception?
a. albumen b. amnion c. chorion d. allantois e. yolk sac
Why is it so important that all of the chromosomes align on the metaphase plate during metaphase?
A. This is the location where the chromosomes can become attached to the spindle microtubules. B. If they cannot, it suggests that they aren't properly attached to the spindle microtubules, and thus won't separate properly during anaphase. C. This allows sister chromatids to form. D. This allows asters to form. E. This is the only place in the cell where the cyclins and Cdks are located.