Birds belong to a related group of vertebrates that includes all of the
A) ray-finned fishes.
B) amphibians.
C) lobe-finned fishes.
D) reptiles.
E) mammals.
D
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Haemophilus influenzae type b is a causative agent of meningitis in children.
Answer the following statement true (T) or false (F)
What is the respiratory surface where gas exchange occurs?
A) trachea B) bronchioles C) pharynx D) alveoli
Over 470,000 cases of cholera were reported in Haiti in the two years following the 2010 earthquake. Which of the following was the most likely mode of transmission?
A) mosquitoes B) aerosols C) contact D) contaminated water E) contaminated milk
An agriculturalist is very concerned because his wheat crop is suddenly covered with red streaks. When consulted, you identify the issue as a condition known as rust. What would you advise the agriculturalist is the best preventive strategy for addressing the cellular basis of the rust?
A. Rust is caused by rust-colored mushrooms produced as fruiting bodies. Treat the plant to eliminate the fruiting bodies that are recognized as rust. B. Rust is caused by fungi that have reddish spores that emerge from the leaves of infected plants. Treat the plant to eliminate the fungi that causes the rust. C. Rust is caused by fungi that have enzymes for breaking down plant structure. Treat the plant to make it resistant to the enzymes that are causing the rust. D. Rust is caused by fungi that give a reddish cast to soils in which they grow, which is taken up by the plant. Treat the soil to prevent the uptake of the rust-causing fungi.