Which of the following is NOT an example of variation?
A) cats can have long or short fur
B) both monocotyledons and dicotyledons perform the dark reaction
C) a child does not have her mother's hair color
D) giraffes have not been seen in an albino form
E) lobsters can come in many colors including blue, read, and brown
Answer: B
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A substrate binds an enzyme as a signal molecule binds a
A. second messenger. B. kinase. C. receptor. D. transcriptional factor. E. G-protein.
A mycologist visits your biology class and discusses her research on a particular fungus that lives on the bark of damaged spruce trees. She explains that the fungal hyphae of her research organism is heterokaryotic. You raise your hand and request that she define that word. Her correct response is
A. heterokaryotic means that the nuclei of the fungal hyphae are genetically the same. B. heterokaryotic means that the nuclei of each compartment of the hyphae are genetically distinct. C. heterokaryotic means that each compartment of the hyphae contain two distinct nuclei. D. heterokaryotic means that each compartment of the hyphae contains only one nucleus.
The Coriolis effect is:
a. the downwelling of seawater at the equator. b. the upwelling of seawater at the equator. c. the apparent deflection of the path of air and water. d. the reduction of air speed over the ground as one goes from the equator to the poles.
One goal of pedigree analysis is to discover whether the gene in question is located on an X or a Y chromosome or on
a(n) ____________________.Fill in the blank(s) with the appropriate word(s).