Sketch and label a cross-section through human skin. Identify two differences that would occur if the
skin were exposed to UV radiation. What will be an ideal response?
The sketch should resemble Fig. 40-1 on textbook p. 844. Exposure to UV radiation would cause the
epidemis to thicken and melanin production to increase
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All cases of paralytic polio acquired in the U.S. between 1980 and 1999 were caused by Sabin's polio vaccine
Indicate whether this statement is TRUE or FALSE.
You cross a pink snapdragon (CRCW) with a white snapdragon (CWCW). What percentage of the
progeny will be red?
a. 0% b. 25% c. 50% d. 75% e. 100%
How is the Ti plasmid used to create transgenic plants?
a. The Ti plasmid allows all of the plant cells to host the bacteria Rhizobium radiobacter and thus express the foreign gene that was inserted into the bacterial chromosome. b. The Ti plasmid inserts the foreign gene directly into the plant's nuclear DNA. c. Once the Rhizobium radiobacter forms a tumor in the plant, the tumor cells can take up the foreign DNA and incorporate it into their chromosomes. d. The Ti plasmid inserts the foreign DNA into the DNA in the chloroplast. e. The Ti plasmid inserts the foreign DNA into the plant's mitochondrial DNA.
What is one of the major variables in the peacock butterfly experiment?
a. pattern/color of the wings b. range of migration
c. species of bird predator d. experimental location e. percentage of survivors