The box numbered 2 represents which process?
A) cycling of energy
B) decomposers acting on all parts of the system
C) cycling of matter
D) gases in the atmosphere that can block sunlight
Ans: C) cycling of matter
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To observe the three-dimensional structure of a cell the best type of microscopy would be
A. fluorescence microscopy. B. standard light microscopy. C. scanning electron microscopy. D. differential-interference light microscopy. E. transmission electron microscopy.
Which is a disadvantage of air as a respiratory medium?
a. Air evaporates water from the respiratory surface. b. Air contains 30 times as much O2 as water. c. Air is 1000 times less dense than water. d. Air requires less energy to ventilate over the respiratory surface. e. O2 diffuses more rapidly in air than in water.
Deductive reasoning generates the conclusion that because we are here to think about and ask questions about the first living thing on Earth, it must have existed
This first living thing presumably gave rise to multiple lineages, at least one of which served as the ancestor for all of life on Earth. The acronym IDA has been applied to the first living thing, and LUCA to the ancestor that gave rise to all of life. What do IDA and LUCA stand for?
The pH indicator in the MR/VP medium is
A. The correct answer is not listed B. Kovac's reagent C. Phenol red D. Neutral red E. Methyl red