The nucleotides within DNA are composed of a
A. phosphate group, deoxyribose sugar, and nitrogenous base.
B. sulfur group, ribose sugar, and nitrogenous base.
C. phosphate group, hexose sugar, and nitrogenous base.
D. phosphate group, ribose sugar, and nitrogenous base.
E. sulfur group, deoxyribose sugar, and nitrogenous base.
Answer: A
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Mobile bits of DNA that can jump from one location on a chromosome to another location are called
A. simple sequence repeats. B. transposons. C. exons. D. introns. E. pseudogenes.
Cotyledons are the __________ of a plant
a. developing seeds b. first developing leaves c. gametes d. stored energy
In Long Beach, CA, recent proposals have suggested removing the breakwall that has protected the Los Angeles/Long Beach harbor for nearly half a century. This has been suggested as a way of returning the Long Beach coastline to its natural pre-breakwall state. Can you suggest any reasons why this may not be such a good idea?
What will be an ideal response?
According to Ernst Mayr, a species consists of
individuals that are characterized by all of the following EXCEPT a. they are in one or more groups. b. they produce fertile offspring. c. they are reproductively isolated from other groups. d. they are similar in appearance. e. they interbreed.