Four of the five effects listed below are caused by
abscisic acid. Select the exception.
a. may be involved in the dropping of leaves and
fruits
b. promotes stomata closure
c. promotes seed dormancy
d. confers resistance to water stress
e. stimulates cell elongation
Answer: e
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Match the microbe with an example of its importance to humans.
A. This group includes beneficial microorganisms that fix nitrogen, make antibiotics, vitamins and enzymes, as well as harmful microorganisms that cause disease such as plague and strep throat. B. Members of this group have caused "mad cow disease" and Creutzfeld Jacob disease. C. Members of this group include decomposers, associate with plant roots and help plants grow, produce antibiotics, help bread rise, and help make wine. D. Members of this microbial group cause serious diseases such as smallpox, AIDS, and Ebola fever. E. Members of this group are photosynthetic, include unicellular and multicellular forms, and are the foundation of aquatic food chains.
The two photosystems of light reactions differ
slightly in their a. carotenoids. b. xanthophylls. c. chlorophyll b. d. chlorophyll a. e. location in the stroma.
Facilitated diffusion uses a channel protein to let components move down their concentration gradient.
a. true b. false
Most neurons have formed by the ____, allowing reflexive movements.
A. first trimester B. fourth month C. third trimester D. ninth month E. seventh month