Fungal diseases include all of the following EXCEPT
A. oral thrush.
B. ringworm.
C. athlete's foot.
D. strep throat (pharyngitis).
Answer: D
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You discover a gene that results in a complete lack of hair in rats, and you name the gene "chromedome." A cross of homozygous normal and homozygous bald rats results in all bald rats. You conclude that the baldness allele is dominant, but when you repeat the cross with different rats none of the offspring are bald. Extremely puzzled you study your records and discover that in the first cross the bald rat was female, while in the second cross the bald rat was male. What do you conclude from this information?
A. Chromedome is imprinted in females. B. Chromedome is imprinted in males. C. Chromedome is dominant in females and recessive in males. D. Chromedome is dominant in males and recessive in females. E. Chromedome is an X-linked gene.
Plants have adapted to dry land by evolving all of the following except association with mycorrhizae to improve mineral uptake
a. secreting a waxy coating to prevent water loss. b. forms of chlorophyll more efficient at capturing light. c. tissues to conduct water through the plant. d. structures to protect reproductive cells and embryos.
Proteins that speed up reactions are known as
a. salts. b. buffers. c. monomers. d. polymers. e. enzymes.
Each DNA strand has a "backbone" that consists of alternating
a. amino acid units. b. nitrogen-containing bases. c. hydrogen bonds. d. sugar and phosphate units. e. amines and purines.