The synaptonemal complex becomes fully developed during which stage of prophase I?
A) leptotene
B) zygotene
C) pachytene
D) diplotene
E) diakinesis
Answer: C
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Which of the following is a correct statement about the MacArthur/Wilson Island Biogeography Model?
A) The more species that inhabit an island, the lower the extinction rate. B) As the number of species on an island increases, the emigration rate decreases. C) Competitive exclusion is less likely on an island that has large numbers of species. D) Small islands receive few new immigrant species. E) Islands closer to the mainland have higher extinction rates.
Water constantly enters the cells of a freshwater sponge by osmosis. How is the sponge adapted to handle this problem? a. Contractile vacuoles expel fluid to the outside of each individual cell
b. Action of cilia in flame cells drives interstitial fluid into tubes, then out of pores at the surface. c. Extra water and wastes are transported into Malpighian tubules that route them out of the body. d. Water is excreted through tubular excretory organs called nephridia.
Explain the hypersensitive response
What will be an ideal response?
What hypothetical hormone promotes flowering but has never been successfully isolated?
a. florigen b. ubiquitin c. jasmonic acid d. brassinosteroids e. methyl salicylat