What is the correct sequence of events that has led to the decimation of the kelp beds along the west coast of the U.S.?a. sea otters decline in numbersb. increase in orca predation on sea ottersc. decline in the seals and sea lionsd. overfishing of the herring and perche. increase in the sea urchin population
A. d - c - b - a - e
B. b - d - c - a - e
C. d - b - c - a - e
D. d - c - b - e - a
E. a - d - c - b - e
Answer: A
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High levels of the fungus Batrachochytrium dendrobatidis were found in a local pond. What do you predict will be the consequence of this fungus?
A. Vegetation levels will decline drastically. B. Since this is a major pollutant in sewage wastewater, an investigation into the source of the fungus must be undertaken. C. Lichen populations will increase around the pond. D. Frog populations will decline. E. Humans in the surrounding area will be vulnerable to pneumonia.
Preventing _____ions from leaking into the cell will block the action potential
a. potassium b. sodium c. calcium d. chloride e. ammonium
__________ selection favors intermediate forms of a trait where __________ selection favors extreme forms. Fill in the blank(s) with the appropriate word(s)
Which of the following is(are) among the most
effective contraceptive approaches? a. abstinence b. tubal ligation c. vasectomy d. hormonal implant e. all of these