Coastal wetlands, or marshes, serve to
A) purify water farther upriver.
B) return nitrogen to the atmosphere.
C) store phosphorus.
D) provide a habitat for major predators.
E) "absorb" water from major storms.
E
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Which of the following hypotheses is the most current and accepted one with regard to modern human origins?
A. the multiregional hypothesis B. the out-of-Africa hypothesis C. the convergent hypothesis D. the single regional hypothesis
If a person were born without eccrine glands, what skin function would he or she have a hard time completing?
A) metabolic function B) cutaneous sensation C) thermoregulation D) having the skin act as a physical barrier
Which of the following statements best compares the pedicel and receptacle?
A. The pedicel and receptacle are identical, merely two names for the same structure. B. The pedicel is haploid and the receptacle is diploid. C. The pedicel is a reproductive part of a flower and the receptacle is a vegetative part. D. The receptacle is the part of the flower that receives the pollen whereas the pedicel relays sperm to the ovule. E. The pedicel is the tip of the stem bearing the flower and the receptacle is the base of the flower.
Each enzyme normally has specific pH and temperature optima at which they function best.
Answer the following statement true (T) or false (F)