Acid rain
a. attacks nylons.
b. attacks marble statues.
c. seriously damages the chemistry of the ecosystem.
d. contains sulfuric and nitric acids.
e. all of these.
E
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Review the ABC model for flower development in Arabidopsis shown below. Which of the following statements about the ABC model is incorrect?
A. Activity A alone results in the formation of sepals. B. Activity A and B together result in the formation of petals. C. Activity B and C together result in the formation of stamens. D. Activity C alone results in the formation of carpels. E. If activity B is missing, only petal formation will be affected.
Birds and fish contain high amounts of yolk in their eggs. What can be said about cell cleavage during embryonic development in these animals?
A. It is meroblastic. B. It is holoblastic. C. It is complete. D. The blastula that forms involved cleavage through the entire egg. E. It is impossible for bird and fish eggs to undergo cleavage during development.
A common adaptation of coastal plants that grow on sand dunes is
A. deep roots to extract moisture. B. broad leaves for enhanced photosynthesis. C. secretion of proteinaceous threads. D. increased transpiration of water. E. elevated growth rates.
Multiple hydrogen bonds together stabilize proteins into a spiral structure called a ____
a. water lattice
b. alpha helix c. chemical groups d. delta minus e. delta plus