Which of these types of islands is predicted to have the lowest number of species?
A. small island near mainland
B. large island near mainland
C. large island far from mainland
D. small island far from mainland
E. the island closest to mainland regardless of size
D. small island far from mainland
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A gene library from a particular human's retinal cell would be a collection of _____
A) DNAs cut by a restriction enzyme B) plasmids cut by a restriction enzyme C) different DNA fragments ligated into different plasmids D) genes that have been sequenced from a particular organism E) PCR-amplified DNAs
Which of the following is true about base excision repair (BER) in bacteria?
A. BER is used to repair abasic sites created by hydrolysis or by DNA glycosylases. B. BER requires the action of a unique exinuclease activity to cleave 5' of the abasic site. C. At the nick created by the nuclease, Pol III can excise the damaged strand by nick translation. D. BER can be used to excise benzopyrene adducts. E. BER requires binding of the MutS protein to identify the abasic site.
States of consciousness are controlled by the
a. reticular formation. b. medulla. c. cerebellum. d. cerebral cortex. e. hypothalamus.
What do stick insects (Phasmatodea) eat?
a. Other insects b. Leaves c. Nothing, their mouth parts are vestigal d. insect eggs and mites