Many species of ants "farm" aphids, protecting these insects and collecting concentrated sugars known as honeydew from them. The relationship between such an ant and its aphids is known as
A. mutualism.
B. defensive mutualism.
C. parasitism.
D. predation.
E. amensalism.
B. defensive mutualism.
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Which of the following is responsible for transporting water and solutes in gymnosperms?
a. tracheids b. phloem c. stroboli d. sporophytes
Which hormone causes lengthening in plants by stimulating cell division and elongation along the long axis of stems and other organs?
a. auxin b. cytokinin c. ethylene d. gibberellin e. abscisic acid
How can sampling error be reduced?
A) by increasing the sample size B) by performing statistical tests on experimental data C) by performing double-blind experiments D) by monitoring changes in the experimental and control groups
The production of a single type of spore that gives rise to both sperm and eggs is known as _______.
A. Homospory B. Heterospory C. Monophyly D. Embryogenesis E. Symbiosis