Shredders, collectors, and small predatory fish such as sculpins, darters, and trout are the dominant organisms collectively found in
A) estuaries.
B) small headwater streams.
C) medium-sized streams.
D) large rivers.
B
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Recombinant chromatids have a mix of paternal and maternal alleles due to Select one:
a. crossing over having happened between the linked genes. b. independent assortment. c. persistent linkage of genes on the chromatid. d. point mutations and gene aberrations from replication. e. random fertilization of the gametes.
A decrease in the affinity of hemoglobin for oxygen caused by the binding of carbon dioxide to hemoglobin is described by the
A) Haldane effect. B) Bohr effect. C) carbamino effect. D) Henderson-Hasselbalch effect. E) respiratory quotient.
Where would you expect to find methanogens?
A) Near a volcano B) In the surf along the beach C) On the surface of plants D) In the digestive tract of cows
Refer to Figure 50-2. The function of the structure labeled 3 is:
a. to secrete an alkaline fluid that neutralizes the acids of the vagina. b. to produce a nutritive fluid for the sperm. c. to provide a place for maturation and storage of sperm. d. to secrete mucus that lubricates the penis. e. None of these.