Which of the following is NOT strictly a freshwater community?
A. ponds
B. streams
C. estuaries
D. lakes
E. rivers
Answer: C
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Which of the following situations will lead to natural selection?
a. The seeds of two plants land near each other and grow to similar sizes. b. Two types of fish eat the same kind of food have the same number of offspring. c. Male lions compete for the right to mate with females, with only one possible winner. d. A drought in an agricultural area leads to a loss of different types of crops and plants.
The movement of oxygen and hydrogen in the form of water takes place in which cycle?
a. global water cycle b. atmospheric cycles c. sedimentary cycles d. solar-plant cycle e. all of these
Select the best response to the question. ? Who is covered by the Bloodborne Pathogen Standard?
A) all employees who may come in contact with blood and other infected materials as part of their job duties B) all clinical workers handling blood C) all nurses and ancillary clinical staff D) all hospital employees
Which of the following convert soil ammonium to nitrate?
A) nitrifying bacteria
B) ammonifying bacteria
C) mycorrhizae
D) nitrogen-fixing bacteria