Sharks, rays, and skates belong to the
a. Aves.
b. Amphibia.
c. Chondrichthyes.
d. Osteichthyes.
e. Reptilia.
Answer: c
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How does the size of fungal hyphae contribute to their ability to decompose detritus?
A. Fungal hyphae have a low ratio of surface area to volume, so they are able to absorb more nutrients. B. Fungal hyphae have high ratio of surface area to volume, so they are able to absorb more nutrients. C. Fungal hyphae have a low ratio of surface area to volume, so they are able to secrete more digestive enzymes into the surrounding environment to break down detritus. D. Fungal hyphae have a high ratio of surface area to volume, so they are able to secrete more digestive enzymes into the surrounding environment to break down detritus.
The chemical reactions in cells are called ____
a. substrate b. coenzymes c. receptor sites d. metabolism e. active site
What compound is found at the reaction center of a photosystem?
A) chlorophyll b B) carotenoids C) phycobilins D) chlorophyll a
Approximately how many oxygen molecules can a single RBC carry?
A. one hundred B. less than 10 C. one thousand D. one billion E. one million