Respiratory syncytial virus (Pneumovirus)
A. is the most common cause of respiratory infections in babies.
B. causes serious disease in infants 6 months old or younger.
C. can be treated with the antiviral aerosol Ribavirin.
D. uses the nasopharynx as its main replication site.
E. All of the choices are correct.
Answer: E
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The citric acid cycle is a cycle because the starting molecule, _____, is regenerated at the end
A. acetyl-CoA B. oxaloacetate C. fructose 6-diphosphate D. pyruvate E. citrate
In the avian and mammalian eye, the lens remains stationary but changes shape in order to focus on objects at various distances. This is called "accommodation" and is accomplished through adjusting muscle control of the lens in order to
A. alter the sensitivity of the eye to varying light levels. B. control the amount of light admitted to the eye through the pupil. C. bend light rays to varying degrees according to the angle at which light enters the eye. D. convert light energy into electrical signals by the retina. E. regulate the vitreous humor volume.
In sponges, spicules are secreted by amoeboid cells
____________________ Indicate whether the statement is true or false.
Given that phylogenies are based on shared derived characteristics, which of the following traits is useful in generating a phylogeny of species W, X, Y, and Z?
Species W Species X Species Y Species Z Trait 1 A A A A Trait 2 A A B B Trait 3 A B C D A) Trait 1 B) Trait 2 C) Trait 3 D) Traits 1, 2, and 3