Regulatory proteins can identify specific sequences on the DNA double helix without unwinding the helix. This is accomplished by inserting
A. RNA promoters into either the major groove or the minor groove of the double helix where the edges of the nitrogen bases protrude.
B. DNA-binding motifs into the minor groove of the double helix where the edges of the nitrogen bases protrude.
C. DNA polymerase into the major groove of the double helix where the edges of the nitrogen bases protrude.
D. RNA polymerase into the major groove of the double helix where the edges of the nitrogen bases protrude.
E. DNA-binding motifs into the major groove of the double helix where the edges of the nitrogen bases protrude.
E. DNA-binding motifs into the major groove of the double helix where the edges of the nitrogen bases protrude.
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The vertical dive of a moth for cover when it hears the ultrasound chirps of an approaching bat is an example of a(n)
A. sign stimulus. B. fixed action pattern. C. innate releasing mechanism. D. supernormal stimulus. E. kinesis. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about animal behavior patterns? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The total number of observed links in the food web divided by the total number of species is the
A) connectance. B) Simpson index. C) linkage density. D) mean chain length.
Limulus polyphemus are the source of ________
A) calcitonin used to treat osteoporosis B) growth hormone used to treat dwarfism C) hydroxyapatite used to treat arthritis D) cells for the LAL test used to detect bacterial contamination of surgical tools E) Prialt, a peptide used as a pain reliever
A J-curve is typical of a stable population
Indicate whether the statement is true or false