Salivary amylase begins the digestion of which class of foods in the mouth?
a. starch
b. proteins
c. lipids
d. amino acids
e. nucleic acids
a
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Explain why the xylem of angiosperms is probably more efficient at transporting water and minerals than the xylem of gymnosperms
What will be an ideal response?
The oldest fossils
a. demonstrate the widest distribution. b. represent the most highly evolved organisms. c. are found buried deeper in the ground than more modern forms. d. are found in Africa. e. are primitive marine vertebrates
How is the mycelium a valuable adaptation for a fungus?
A. It discourages animals from feeding on the fungus. B. It provides a strong anchor for the fungus. C. It provides physical support for the fragile sporophyte generation. D. It provides a vast surface area for the generation of spores. E. It provides a large surface area for the absorption of nutrients and moisture.
In T4 phages, which of the following makes the initial contact with the appropriate receptor site?
A. Tail fiber B. Tail tube C. Collar D. Base plate