How does an enzyme work to catalyze a reaction?
A. It lowers the activation energy of a reaction.
B. It supplies the energy to speed up a reaction.
C. It increases the concentration of the reactants in a reaction.
D. It allows the reaction to proceed through different intermediates.
E. It raises the temperature of a reaction.
Answer: A
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If individuals 4 and 7 have a child, what is the probability that the child will exhibit the trait?
Above is a pedigree for a common human trait (not a disease) controlled by a single gene. Shaded symbols are for individuals exhibiting the trait.
A) 1/4
B) 1/2
C) 1/6
D) 2/3
E) 0
The sum total of an individual's direct and indirect fitness is known as ________. [two words]
Fill in the blank(s) with correct word
What is the function of dideoxynucleotides in Sanger DNA sequencing?
A. They act as primers for reverse transcriptase. B. They allow only the specific sequencing of the RNAs of a genome. C. They stop synthesis at a specific site, so the base at that site can be determined. D. They cut the sequenced DNA at specific sites. E. They act as primers for DNA polymerase.
Which observation would be evidence for allopatric speciation among finch species of the Galápagos Islands?
A. The birds are closely related to birds found on the mainland. B. No pairs of sister species formed on the same island. C. Pairs of sister species can be found on adjacent islands. D. Specific beak sizes are adaptations to the seeds of different species. E. Many different species have been found on the islands.