Which of the following is the smallest?
a. molecule
b. atom
c. tissue
d. cell
b
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Hormones are cleared from the body by endocrine glands
Indicate whether the statement is true or false.
Which of the following statements is NOT
true?
a. In asexual reproduction, the parent passes a complete set of genes to its offspring. b. In sexual reproduction, both meiosis and fertilization are usual events in the life cycle. c. In sexual reproduction, a human offspring receives two genes for every trait. d. Sexual reproduction puts together new combinations of genes. e. Sexual reproduction results in less variation within a population
Crossing over
a. increases variability in gametes. b. happens only once per homologue pair. c. occurs between sister chromatids. d. prevents genetic recombination. e. is followed immediately by separation of each of the chromatids.
Mitotic chromosomes were first visualized with the use of very simple tools: a basic light microscope and some dyes. Which of the following characteristics of mitotic chromosomes reflects how they were named?
(a) motion (b) color (c) shape (d) location