Sugars dissolve well in water because of water's ______
A. polarity
B. ionic bonds
C. hydrophobic exclusion
D. cohesiveness
A
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E are _______ major families of RNA containing viruses that infect vertebrates
A. 2 B. 5 C. 7 D. 13
Natural selection results in
a. adaptation. b. a mutation. c. a new species. d. genetic drift. e. stabilizing selection.
In a particular plant, two genes control leaf shape and color. Round leaves (R) are dominant to jagged leaves (r). Yellow fruits (Y) are dominant to white fruits (y). A true-breeding roundleaved, yellow-fruited plant is mated with a jagged-leaved, white-fruited plant. What are the genotypes of the plants involved in this cross?
A) RRYY ´ RRYY B) RRYY ´ rryy C) RrYy ´ RrYy D) cannot determine from the information given
In which of the following habitats would you expect to find the largest number of K-selected individuals?
A) a recently abandoned agricultural field in Ohio B) the sand dune communities of south Lake Michigan C) the flora and fauna of a coral reef in the Caribbean D) South Florida after a hurricane E) a newly emergent volcanic island