What hormone promotes apical dominance in plants?
a. abscisic acid
b. auxin
c. cytokinin
d. ethylene
e. gibberellin
B
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C3 plants are more susceptible to photorespiration than either C4 or CAM plants, so why do most
plants lack the C4 pathway?
a. Rubisco is more efficient in C3 plants when compared to rubisco C4 and CAM plants. b. Photorespiration is not a serious problem for most plants. c. Most plant species do not have vacuoles in their cells to store the malate generated from CO2 taken in during the night. d. There is an energetic cost to C4 and CAM pathways that only makes them advantageous in very hot and/or arid environments. e. Switching between C3, C4, and CAM photosynthesis is very difficult for most plants.
How have Alaskan salmon been genetically modified?
A) Bacterial genes have been inserted to resist invasive diseases. B) Genes from freshwater algae have been inserted for an internal energy source. C) Growth hormone genes from a faster growing fish species have been inserted. D) Genes for the overproduction of essential fatty acids have been inserted.
A stain technique that uses only one dye is termed a __________ stain.
A) positive B) differential C) simple D) Gram
Sodium concentrations are higher outside and glucose concentrations are higher inside the cell. Using the same membrane protein for Na+ and glucose transport, what is it called when a Na+ electrochemical gradient is used to drive glucose transport into the cell against its concentration gradient?
A. secondary active transport B. primary facilitated diffusion C. passive diffusion D. secondary facilitated diffusion E. primary active transport