Which of the following characteristics do not occur in ANY cyanobacterium?
A. undergoes photosynthesis
B. poisons natural bodies of water
C. generates oxygen
D. generates methane
E. detects the Earth's magnetic field
D. generates methane
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Which of the following refers to a paired cross in which the respective traits of the male and female in one cross become the respective traits of the female and male in the other cross?
a. reciprocal cross b. test cross c. dihybrid cross d. monohybrid cross
The point at which this neuron will be able to
generate another action potential is indicated by a. A. b. B. c. C. d. D. e. E.
A type II survivorship curve, drawn by plotting the number of individuals in a given population alive at the beginning of each age interval, is characterized by
A. most individuals dying of old age. B. most individuals dying during their reproductive years. C. individuals dying at a constant rate throughout time. D. many individuals dying early in life.
Which one of the following statements about transport of nutrients in phloem is correct?
A) Solute particles are actively transported from phloem at the source. B) Companion cells control the rate and direction of movement of phloem sap. C) Differences in osmotic concentration at the source and sink cause a hydrostatic pressure gradient to be formed. D) A sink is the part of a plant where a particular solute is produced.