Which horizon has the highest amount of organic matter?
A. A
B. B
C. C
Answer: A
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The earliest evidence of life on Earth is over 3 billion years old. Indicate whether the statement is true or false
Which of the following best describes picoheterotrophs?
A) They are anaerobic microorganisms that decompose biomass through fermentation. B) They carry both photosynthesis and chemosynthesis. C) They are common microscopic aerobic decomposers in both terrestrial and marine ecosystems. D) They are minute parasites of many species of terrestrial plants and marine algae.
Cellular respiration ________
A) releases carbon dioxide and water B) involves a net consumption of water C) requires the green pigment chlorophyll D) represents a decrease in entropy E) results in a net consumption of energy
Air that resists vertical movement is said to be ________
A) unstable B) stable C) cyclonic D) anticyclonic E) adiabatic