Which structure(s) provide a huge surface area for diffusion of gasses?
a. the bronchi
b. the bronchioles
c. the trachea
d. the alveoli
e. the lungs
D
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Bony fishes possess two features not found in other fish. Select the best choice from those listed below to complete the following sentence. Bony fishes have
A. swim bladders and gill covers called opercula. B. swim bladders and a complete digestive system. C. swim bladders and a closed circulatory system. D. swim bladders and movable jaws.
Surface temperatures in the eastern Pacific Ocean are warmer during El Niño conditions than during La Niña conditions
Indicate whether the statement is true or false
Which protist causes African sleeping sickness?
A) Didinium B) Plasmodium C) Giardia D) Trypanosoma E) Pfiesteria
Proteins on the surface of phagocytes called ________ aid in the detection of pathogen molecules
A) lectins B) TLRs C) NOD proteins D) lectins and C3 protein E) both TLRs and NOD proteins