Which of the four numbered features on this figure is the oldest?
A. 1
B. 2
C. 3
D. 4
Answer: A
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Bacteria, deer, humans, and spiders are all examples of ____________________
Fill in the blanks with correct word
Three criteria used for classification of the atmosphere are
A) structure, origin, evolution. B) structure, origin, temperature. C) composition, temperature, and function. D) composition, origin, evolution.
The cause of Earth's seasons is the ________
A) varying output of the Sun B) polarity of the its axis C) shape of the Earth D) varying distance between the Earth and the Sun E) cold experienced each wintertime
Life-cycle analyses
A. provide for unlimited access to resources. B. evaluate material and energy inputs and outputs at each stage of manufacture, use, and disposal of a product. C. have led to an increase in the amount of material going into land-fills.