The correct symbol for a hydroxide ion is
A. H-.
B. H+.
C. (OH)-.
D. (OH)+.
C. (OH)-.
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Who originally identified a highly condensed structure in the interphase of nuclei?
A. Lyon B. Barr C. Ohno D. None of the answers are correct
Which trait is a characteristic of most eudicots?
a. four or five floral parts, or multiples of four or five b. three furrows with pores on pollen grain c. vascular bundles organized as a ring in ground tissue d. branching fibrous root system e. two seed leaves of embryo inside the seed
Gregor Mendel's pioneering genetic experiments with pea plants occurred before the discovery of the structure and function of chromosomes. Which of the following observations about inheritance in pea plants could be explained only after the discovery that genes may be linked on a chromosome?
(A) Pea color and pea shape display independent inheritance patterns. (B) Offspring of a given cross show all possible combinations of traits in equal proportions. (C) Most offspring of a given cross have a combination of traits that is identical to that of either one parent or the other. (D) Recessive phenotypes can skip a generation, showing up only in the parental and F2 generations.
Collecting data without a specific hypothesis in mind is called
A. hypothesis testing. B. reductionism. C. discovery-based science. D. theoretical. E. All of the choices are correct.