Which of the following are soluble mediators and activators for T lymphocytes and B cells?
A) IL-2
B) IL-4
C) IL-5
D) IL-2, IL-4, and IL-5
Answer: D
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Which one of the following is not an ecosystem service?
A. maintaining the quality of water supplies B. habitat restoration C. preventing soil erosion D. absorbing pollutants E. moderating climate
The area over which an animal moves in the course of daily activity, but which it does not necessarily defend against other animals, is called what?
A. family home B. foraging space C. home range D. nesting site E. territory
The fluid nature of the membranes is attributed to a lateral movement of
A. pumps such as the proton pump. B. phospholipid molecules. C. the entire lipid bilayer. D. antigen molecules. E. protein channels.
A transcription start signal is called a(n)
A) origin. B) start site. C) initiation codon. D) promoter. E) nonsense codon.