Low-pitched, long-wavelength sounds are distinguished by stimulating
A. the basilar membrane far from the base.
B. the semicircular canals.
C. the basilar membrane more vigorously.
D. only the vertical semicircular canals.
A. the basilar membrane far from the base.
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Soils rich in iron oxide are
A) blackish. B) yellowish-brown or reddish. C) whitish or grayish. D) greenish.
The inclusive term that describes all of the DNA in the nucleus of a cell is its
A. genome. B. chromosome. C. proteome. D. gene.
Identify the polyphyletic group.
A. Bacteria B. Chloroplasts C. Eukarya D. Protists E. Archaea
Why did the dinosaurs become extinct?
A. The pollen produced by the rise in flowering plants produced allergenic responses in dinosaurs and interfered with their ability to communicate with potential mates. B. Increasing carbon dioxide levels produced climates too hot for the incubation of their eggs. C. Cycads and other gymnosperms upon which herbivorous dinosaurs fed declined, and the dinosaurs were unable to digest the angiosperms that arose in their place. D. A meteorite or comet crashed into the Earth, causing smoke and ash that blocked the sun and caused death of the plants that were food for herbivorous dinosaurs. E. The changing climate caused the evolution of most dinosaur species into the existing bird, mammal, and reptile species that exist today.