Which of these is not a function of the root cap?
A. rapid cell division
B. releasing a slimy lubricant fluid
C. protection of the root tip
D. gravity perception
E. pushing away soil particles as the root grows
Answer: A
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The difference between normal and sickle-cell
hemoglobin is based upon a. the number of amino acids in the molecule. b. the substitution of one amino acid for another. c. the number and orientation of the amino acid chains attached to the heme portion of the molecule. d. the number of oxygen molecules that can be carried. e. the type of bone marrow that produces it.
Which statement is true about two reactions that are coupled?
A) One reaction will normally not occur without the other. B) One is always exergonic and the other is always endergonic. C) Only oxidation-reduction reactions can be coupled. D) Coupled reactions are always driven by the ATP to ADP conversion.
Knowledge of silencing genes provided scientists with clues to the expression of genes controlling what characteristic in petunias?
A. number of flower parts B. color expression C. time of flowering D. placement of flower parts E. vitamin deficiencies
A group of organisms of the same species within a community is called a
A. niche. B. community. C. population. D. habitat. E. biome.