Salivary amylase begins the breakdown of what substance?
a. amino acids
b. lipids
c. starch
d. protein
c. starch
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On an annual basis, the greatest flow of carbon between nonbiological reservoirs takes place between:
a. the atmosphere and Earth's rocks b. the ocean and Earth's rocks c. the ocean and the atmosphere d. plants and Earth's rocks e. aquatic organisms and the atmosphere
Vibration of the ________ bends hairs of the hair cells, which ultimately generate impulses in ________
A) basilar membrane; hair cells B) sensory neurons; tectorial membrane C) hair cells; sensory neurons D) organ of Corti; hair cells E) basilar membrane; sensory neurons
Ectotherms depend on the environment for their body heat
____________________ Indicate whether the statement is true or false.
Why don't the countries that most need high-protein crops grow them?
A) High-protein crops usually require fertilizers, which may not be affordable to these countries. B) High-protein crops require extensive irrigation, which may not be affordable to these countries. C) High-protein crops are more difficult to process, making the foods they produce too expensive. D) High-protein crops are typically low in most other vital nutrients.