In a selectively permeable membrane, gases
What will be an ideal response?
cross freely
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Which of the following is/are a habitat island?
A. a freshwater pond in a meadow B. a black basalt lava flow in the middle of the desert C. an individual cluster of pines in the middle of a pine forest D. a freshwater pond in a meadow and a black basalt lava flow in the middle of the desert E. a freshwater pond in a meadow, a black basalt lava flow in the middle of the desert, and an individual cluster of pines in the middle of a pine forest
Chemicals used for disinfection that are capable of disrupting cellular membranes and reduce the surface tension through cationic disruption of water molecules are termed:
a. alcohols. b. bleach. c. iodine or heavy metal compounds. d. quaternary ammonium compounds.
In cell signal propagation, what does dimerization do?
a. moves water across the plasma membrane in large quantities b. allows activated receptors to interact extracellularly with the surrounding environment c. enables the intracellular domains of the receptors to activate each other d. shuts down the signaling pathway
Manatees are mostly found in:
a. cold polar waters. b. Antarctica. c. tropical estuaries. d. temperate coastal areas. e. Eastern Pacific Ocean.