Prokaryotic operons typically include a(n) ________ and a(n) ________ with multiple genes
A) operator; terminator
B) operator; promoter
C) promoter; repressor
D) inducer; repressor
E) CAP-binding site; inducer
B
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Which of the following is NOT an adaptation of plants to a terrestrial environment?
A. a cuticle to prevent water loss from exposed parts of the plant B. a dominant sporophyte with vascular tissue C. the evolution of photosynthesis in order to supply the energy necessary to live on land D. stomata to regulate gas exchange with the atmosphere
If the beetles survive by consuming cycad pollen, then whether the beetles should be considered mutualists with, or parasites of, the cycads depends upon the ____
A) extent to which their overall activities affect cycad reproduction B) extent to which the beetles are affected by the neurotoxins C) extent to which the beetles damage the cycad flowers D) distance the beetles must travel between cycad microsporophylls and cycad megasporophylls
The biotic potential representing growth without limits at its maximal rate is indicated by what symbol?
A. K B. N/K C. ri D. N E. dN/dt
During repolarization ________.
a. potassium enters an axon and the inside of the cell becomes less negative b. potassium enters an axon and the inside of the cell becomes more negative c. potassium leaves an axon and the inside of the cell becomes less negative d. potassium leaves an axon and the inside of the cell becomes more negative