Answer the following statements true (T) or false (F)
1.The first step in germination of a plant seed is the absorption of water.
2.Jasmonic acid is a plant hormone that activates a plant's defenses against predators.
3.Abscisic acid is a plant hormone that activates a plant's defenses against predators.
4.Cytokinins are plant hormones that stimulate the ripening of fruit.
5.A farmer might use gibberellins to stimulate stem elongation in plants, thereby increasing the crop yield in some plants.
1.TRUE
2.TRUE
3.FALSE
4.FALSE
5.TRUE
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Indirect selection
A. is necessary to isolate auxotrophic mutants. B. uses media on which the mutant but not the parental cell type will grow. C. uses media that reverses the mutation. D. uses media upon which neither the parental cell typeor mutant grows. E. is necessary to isolate auxotrophic mutants AND uses media upon which neither the parental cell typeor mutant grows.
Which group of organisms has an exoskeleton?
a. annelids b. arthropods c. cnidarians d. roundworms e. flatworms
Nuclear signaling is slowed down by CREB.
a. true b. false
__________ secrete products such as sweat or digestive enzymes through ducts. Fill in the blank(s) with the appropriate word(s)