The relative sizes of roots and shoots are regulated by interactions between:
A) auxins and cytokinins.
B) abscisic acid and cytokinins.
C) cytokinins and ethylene.
D) ethylene and abscisic acid.
E) gibberellins and abscisic acid.
Correct Answer:
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Q17: Gravitropism is a plant's:
A)directional response to gravity.
B)response
Q18: Seed germination is stimulated by:
A)auxin.
B)gibberellin.
C)cytokinin.
D)ethylene.
E)abscisic acid.
Q19: Discovered in 2007, the hormones that control
Q20: The hormone _ was named after the
Q21: Placing a ripe apple in a bag
Q23: Ethylene:
A)promotes gravitropism.
B)inhibits stem elongation.
C)prevents leaf senescence.
D)stimulates seed
Q24: Suppose you have some seeds that refuse
Q25: Most scientists believe that the lateral buds
Q26: Which of these hormones causes cell elongation,
Q27: Most scientists believe that the lateral buds
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