Large, flightless, long-necked birds
a. are native to three continents.
b. inhabit flat, open grasslands.
c. closely resemble each other in morphology and
behavior.
d. occur at about the same distance from the
equator.
e. fit all of these descriptions.
Answer: e
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Which mutated gene is inherited in cases of cystic fibrosis?
a. BRCA-1 b. BRCA-2 c. aPOE-4 d. aPOE-2 e. CFTR
Sex chromosomes do all of the following EXCEPT
a. determine gender. b. vary from one sex to another. c. carry some genes that have nothing to do with sex. d. appear in a diploid cell as either XX or XY. e. appear in a haploid cell as either XX or XY.
Outline what is currently known about the regulation of food intake and energy homeostasis. Include the roles of basal
and total metabolic rates, leptin, and neuropeptide Y in your response. What will be an ideal response?
You discover in a study of a group of five fossil taxa with spines that the mean spine length has increased over time. When you tabulate mean spine lengths for each taxon over time, you obtain the following table. X = Taxon has become extinct
Time interval Taxon 1 Taxon 2 Taxon 3 Taxon 4 Taxon 5 245–214 MYA 2.3 7.0 1.4 5.6 4.8 215–184 MYA 2.4 6.9 1.5 5.4 4.6 185–154 MYA 2.2 7.1 1.3 5.3 4.7 155–124 MYA X 7.2 1.5 5.5 4.9 125–94 MYA X 7.0 X 5.7 4.6 95–65 MYA X 6.8 X 5.6 X What kind of process is underlying this active evolutionary trend? What will be an ideal response?