When water ionizes, it produces equal amounts of hydrogen and hydroxide ions that can reassociate with each other. The pH of water is: 5-9-2013
A. 3
B. 4
C. 5
D. 6
E. 7
Answer: E
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The antiparallel arrangement within DNA molecules refers to
A. a purine always bonding to a pyrimidine. B. each base bonding at the 1' position of the sugar. C. one helix strand that runs from the 5' to 3' direction and the other strand runs from the 3' to 5' direction. D. an original parent DNA strand and one newly synthesized DNA strand comprising a new DNA molecule.
An interesting group of ants consists of several virtually identical, closely related species, with females having chromosome numbers of 18, 20, 32, 48, 60, 62, and 64. If one crossed a female of species (
A) with 32 chromosomes and a male species (B) with 9 chromosomes (males are haploid, and each gamete contains the n complement), how many chromosomes would one expect in the body (somatic) cells of the female offspring? A) 32 B) 9 C) 25 D) 4.5 E) 41
Movement of individuals into or out of the population, called gene flow, impacts evolution of populations because
A) it can lead to extinction of one or more populations. B) it may cause genetic drift. C) it leads to a redistribution of alleles. D) adaptive radiation results. E) a founder effect will occur.
A good general rule is to store foods at temperatures below 4°C or above what temperature?
A) 30°C B) 40°C C) 50°C D) 60°C E) 100°C