While on an archaeology expedition, you unearth a skeleton with the following characteristics: four long, slender finger bones and a smaller opposable thumb bone, long arm bones, fingernails, and eye sockets close together on a skull
What type of organism do you suspect you may have found? A) an anthropoid
B) a tarsier
C) a crustacean
D) a marsupial
A
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Two separate photosystems involved in electron flow is a hallmark of
A) anoxygenic phototrophs. B) green sulfur bacteria. C) oxygenic phototrophs. D) purple bacteria.
The human b-globin gene has two alleles, HS and HA. Individuals that are homozygous for HS have sickle-cell anemia and a lower fitness. Individuals that are heterozygotes (HSHA) do not show sickle-cell symptoms and have a resistance to malaria. Individuals that are homozygous for HA have the highest fitness but are susceptible to malaria. If a vaccine for malaria was created that was 100% effective, affordable, and widely available, what would happen to the frequency of the HS allele?
A. The HS allele would increase in regions where malaria is prevalent and decrease in regions where malaria is absent or rare. B. The HS allele would decrease in regions where malaria is prevalent and increase in regions where malaria is absent or rare. C. Due to balancing selection, the frequency of the HS allele would remain stable in all regions. D. The HS allele would increase in regions where malaria is prevalent and remain stable in regions where malaria is absent or rare. E. The HS allele would decrease in regions where malaria is prevalent and remain stable in regions where malaria is absent or rare.
Which of the following processes would be most likely to occur in the Golgi complex?
A) synthesis of steroids B) production and packaging of lipids C) glycosylation of proteins D) synthesis of DNA E) detoxification of drugs
A red blood cell is in an artery in the right leg. How many capillary beds will it pass through before it returns to the left atrium of the heart?
A) none B) one C) two D) three