Chemical digestion occurs when our teeth chew food into pieces convenient for swallowing.
Indicate whether the statement is true or false.
Answer: False
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A mountain range along the coast of a continent is located perpendicular to the prevailing sea breeze. Which one of the following describes an area where the rain shadow is located?
A. on the leeward side of the mountain where cool, dry air is descending B. on the leeward side of the mountain where warm, moist air is descending C. on the windward side of the mountain where warm, moist air is rising D. on the windward side of the mountain where cool, dry air is rising E. on the leeward side, far inland from the mountain
As K permeability increases, the permeability of the membrane to water ________
a. decreases. b. is unaffected. c. increases. d. falls to zero.
The scenario of prebiotic evolution leading to the origin of life on Earth is plausible because
A) it has been observed under laboratory conditions. B) there was a vast period of time for simple chemicals to evolve into complex molecules found in cells that exist today. C) experiments suggest that all of the chemical components of living cells can be formed quickly from inorganic precursors. D) it has been observed to occur on other planets. E) it has been observed to occur near thermal vents at the bottom of the ocean.
Which one of the following is NOT a possible reason to explain why organisms would stop exponential growth?
a) Accumulation of waste products b) Exhaustion of nutrients c) Lack of available space d) Bacteria becoming dormant