What does the directed-pollination hypothesis suggest?
A. Plants are only directly pollinated when other plants of the same species are nearby.
B. Plants that self-pollinate are directed (triggered) to do so by the absence of nearby plants of their species.
C. Natural selection has favored flower traits (scent, shape, color) that attract pollinating animals.
D. Pollination is a process that is directed (triggered) by key plant hormones.
Answer: C. Natural selection has favored flower traits (scent, shape, color) that attract pollinating animals.
You might also like to view...
What are some of the characteristics of flowering plants that have allowed them to flourish?
What will be an ideal response?
The pollen-producing body of a flower is the
A. ovary. B. stigma. C. anther. D. sepal. E. style.
As a general rule, the small intestine of a pig or human is
a. about 60 cm long. b. about 1.5 m long. c. about as long as the individual is tall (or long in the case of the pig). d. about five times the height of the individual.
Which hormone promotes the abscission of leaves and fruits?
A) auxin B) ethylene C) cytokinin D) gibberellin