Experiments in which conditions are deliberately altered and all other variables are held constant are known as ________ experiments.
A. Natural
B. Hypothetical
C. Double-blind
D. Probability
E. Manipulative
Answer: E
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Which of the following is incorrect?
a. The hydrosphere includes water in solid, gas, and liquid forms. b. The lithosphere includes the mantle and crust. c. The biosphere is the only biotic sphere. d. Oxygen is the major element of the atmosphere. e All living organisms are part of the biosphere.
Rainfall is heaviest during the _______________ season in a monsoon circulation system
Fill in the blank(s) with correct word
In tropical rainforests, vegetation layers are structured according to
a. how deep the rainfall penetrates into the forest b. the plant's needs for sunlight c. how well each plant handles predation by herbivores d. nutrient availability and uptake by plant roots e. tropical rainforests are not layered
tRNA has a shape similar to which letter of the alphabet?
A) C B) L C) S D) T