48) 48) The role of a control in an experiment is to A) ensure repeatability B)

Question

48) 48) The role of a control in an experiment is to A) ensure repeatability B) prove that a hypothesis is correct C) counteract the negative effect of the experiment D) provide a basis of comparison to the experimental group. 49) 49) Which of the following statements about cellular metabolism is false? A) Cellular metabolism often occurs on the surfaces of internal membranes. B) Cellular metabolism can occur within organelles. C) Cellular metabolism occurs in animal but not plant cells. D) Cellular metabolism incudes different processes that require different conditions. 50) Organic compounds A) always contain nitrogen. C) always contain oxygen. B) are synthesized only by animal cells. D) always contain carbon. 51) 51) Which of the following lists contains only polysaccharides? A) sucrose, starch, and cellulose C) fructose, cellulose, and glucose B) starch, amino acids, and glycogen D) bellulose, starch, and glycogen 52) 52) The tendency of water molecules to stick together is referred to as A) transpiration. B) polarity C) adhesion. D) cohesion. 53) Which of the following statements about evolution is true? A) Evolution can result in adaptations Individuals evolve within the span of their own lifetimes. Evolution is deliberate and purposehil isms evolve structures in response to needs 54) 54) In ocean acidification, dissolving CO2 gasthe pH of the ocean. B) triples A) raises C) does not affect D) lowers 55) Humans are B) producers and consumers D) producers consumers ) producers and decomposers 56) 56) The complex of proteins and DNA in a nondi D) a lysosome. B) a nucleolus C) ghromatin. A) a ribosome. 57) A phospholipid is composed of A) one fatty acid molecule linked to one glycerol molecule and two phosphate groups B) one fatty acid molecule linked to three glycerol molecules. C) one glycerol molecule linked to one phosphate group and two fatty acids. D) one glycerol molecule linked to three phosphate groups 58) Which of the following is a producer? D) earthworm B) cat C) oak trese A) sun

Explanation / Answer

Que 48)

Ans:

The role of a control in an experiment is to: D) provide a basis of comparision to the experimental group.

Explanation:

- Control group is the part of experiment serves as a basis of comparision, the one variable being tested has been omitted.

- Experimental group shows the effect of one variable being tested.

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