Which of the following explains why leaf primordia develop in spiral or whorled patterns around the stem tip?
A. accumulation of auxin in the stem tip
B. depletion of auxin near leaf primordia
C. accumulation of auxin in leaf primordia
D. loosening of cell walls
E. None of these choices is correct
E. None of these choices is correct
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True or False. An incomplete fossil record is evidence that the theory of evolution is false
A. true B. false
Excess UV light depletes the body of which vitamin?
a. folate b. vitamin A c. vitamin C d. vitamin D e. vitamin E
Why does trimming the top of a plant make the plant bushier?
A. Trimming forces leaves around the vicinity of the cuts to become reproductive leaves. B. Trimming damages or removes the apical meristem, which activates the axillary meristems to grow. C. Trimming stimulates the cork cambium to produce more secondary growth. D. Trimming disrupts vertical transport routes for water and nutrients while enhancing horizontal transport routes. E. Trimming stimulates the plant to produce more rhizomes, which results in more branches.
One of the dangers of smoking is that it disrupts the defensive system that utilizes ciliary action of what type of specialized epithelium?
A. columnar epithelium B. stratified epithelium C. glandular epithelium D. cuboidal epithelium E. pseudostratified epithelium