About __________ million individuals, the majority
of them under age twenty-five, become infected with
an STD in the United States annually.
a. 1
b. 3
c. 5
d. 10
e. 15
Answer: e
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A botanist is studying the effects of different oomycete species on potato plants. He exposes one set of plants to an oomycete species having several avirulence (AVR) proteins
He exposes another set of plants to an oomycete species having a single AVR protein. What do you expect will be the results of his experiment? A. Mortality will be higher in plants exposed to the several-AVR oomycete species. B. Mortality will be higher in plants exposed to the single-AVR oomycete species. C. Mortality rates will be the same in both plant sets.
Which of the following hormones is exclusively
female? a. follicle-stimulating hormone b. luteinizing hormone c. progesterone d. follicle-stimulating hormone and progesterone e. follicle-stimulating hormone, progesterone, and luteinizing hormone
One way in which small viruses package more information into a very small genome is to use overlapping genes so that the same base sequence is read in more than one reading frame.
Answer the following statement true (T) or false (F)
Sharks are osmoconformers that maintain osmolarity with the saltwater but keep ion concentrations similar to osmoregulators. To do this they must use non-ions to osmoregulate, such as urea. As such sharks take on excess ions from the water because their bodies are at a significantly lower ion level than saltwater. How are the excess ions eliminated?
A. active transport across the gills B. Rectal gland C. diffusion across the gills D. None of the answers are correct.