Number, and number in relation the population
a. pattern
b. frequency
c. mode
d. distribution
Ans: b. frequency
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Plasmolysis is the cellular loss of water. How can a cell potentially prevent this?
(a) Decreasing proton concentrations (b) Closing down the cell wall (c) Increasing the cytoplasmic solute concentration (d) Increasing the apoplastic solute concentration
Life originated on earth in which of the following distinct phases?
a. formation of small molecules containing carbon and hydrogen b. formation of self-replicating information-containing molecules c. development of a membrane enabling metabolism and creating the first cells d. None of the above is correct. e. All of the answer options are correct.
Which of the following is NOT true of
euglenoids? a. Many move by pseudopods. b. Many contain chloroplasts. c. Many absorb nutrients from their environment in a heterotrophic manner. d. Their cell body is surrounded by a pellicle. e. They use a contractile vacuole to maintain water balance
Some complement proteins form a membrane attack complex that
a. engulf an invador. b. releases cytotoxic chemicals into an invador. c. causes inflammation. d. creates a pore in an invador causing the punctured cell to disintegrate. e. protects invadors from cytotoxic chemicals.