Which chordate trait evolved first?
A) Calcium-hardened skeleton
B) Amniotic egg
C) Four limbs
D) Skull and backbone
D
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The ability to smell ____
a. manifests as a 1:1 relationship between an odor and a specific receptor b. specific chemicals can indicate a possible reaction to a chemically related drug c. specific chemicals will predict the effectiveness of antidepressants d. is mediated by a family of about 400 genes e. is mediated by the synthesis of olfactory receptors in the brain
How many Barr bodies does a normal human female contain in each diploid cell?
A. 0 B. 2 C. 1 D. 3
The processes of transcription and translation are coupled in
a. Eukaryotic cells. b. Prokaryotic cells. c. Both eukaryotic and prokaryotic cells. d. Neither eukaryotic nor prokaryotic cells.
The Protenor mode of sex determination is the ________
A) XO/YY scheme B) scheme based on single translocations in the X chromosome C) XX/XO scheme D) hermaphroditic scheme E) scheme based on F plasmids inserted into the FMR-1 gene