Paranthropus robustus and Australopithecus africanus are always found in the same deposits
a. true
b. false
Answer: b. false
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Once human nerve cells become mature, they normally exit the cell cycle and remain in ____
a. G0 b. G1 c. G2 d. S phase e. prophase
Root formation in stem cuttings can be improved by
the application of a. synthetic auxins. b. abscisic acid. c. salicylic acid. d. citric acid. e. nitric acid.
The number of trophic levels an ecosystem can support is driven by (select all that apply)
A- The amount of energy available (primary productivity) B-The speed of nutrient cycling (decomposition) C- The population size of top predators in the ecosystem D-The efficiency of energy transfer across trophic levels E- The composition of the plant community
In the chloroplast, sugars are made in a compartment that is filled with a thick fluid called the
A) stomata. B) thylakoid. C) matrix. D) stroma.