Figure 2.2 depicts the (primary/secondary/tertiary) structure of a protein.
Fill in the blank(s) with the appropriate word(s).
primary
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Why do scientists insert their DNA of interest into the middle of the lacZ coding sequence?
a. It makes the bacteria resistant to the antibiotic. b. It provides a way for researchers to sort the bacteria that have the cloning plasmid from the bacteria that don't have the cloning plasmid. c. It aids scientists in developing new antibiotic treatments. d. It provides a way for sorting bacteria that have the gene of interest from the bacteria that just have an "empty" cloning plasmid. e. It makes the bacteria produce more clones.
__________, the first vertebrates able to complete their life cycle on dry land, have water conserving
skin and kidneys, and amniote eggs. Fill in the blank(s) with the appropriate word(s).
The half life of 14C is 5,730 years. If you test a fossilized bone and find that it has 1/8th the 14C as a modern bone, you could conclude that it is approximately _____ years old.
A. 5,730 × 2 = 11,460 B. 5,730 × 1 = 5,730 C. 5,730 × 8 = 42,960 D. 5,730 / 8 = 716 E. 5,730 × 3 = 17,190
In a small group of people living in a remote area, there is a high incidence of blue skin, a condition that results from a variation in the structure of hemoglobin. All of the blue skinned residents can trace their ancestry to one couple, who were among the original settlers of this region. The unusually high frequency of blue skin in the area is an example of
A. mutation B. genetic drift C. natural selection D. sexual selection E. heterozygote advantage