The data below shows recombination of genes (1-5) according to the amount of time available for transfer of the bacterial chromosome during conjugation between different genetic strains in E coli. Based on these data, which gene is closest to gene 1? (Note: The entire chromosome is transferred in 100 minutes.) 
A. gene 4
B. gene 3
C. gene 5
D. gene 2
Answer: D
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Gene flow, defined as the movement of genes from one population to another, can take place by migration, as well as
A. physical movement of genes within an individual by transposons. B. removing the barriers between the populations. C. mating between individuals of adjacent populations. D. mating with certain trait-containing individuals. E. mating with dominant phenotypes.
The area labeled "A" is ____
a. a nucleus b. chromatin c. the nuclear membrane d. a vacuole e. a nucleolus
Which of the following reactions requires the removal of water to form a covalent bond?
A. Glycogen--> glucose subunites B. Peptide--? alanine + glycine C. Cellulose --> glucose D. Glucose + galactose-->lactose E. Fat--> fatty acids + glycerol
Speciation usually requires a period of geographic isolation (allopatry) that facilitates the evolution of reproductive isolation
a. true b. false