During a lecture about evolution PDF

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During a lecture about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result." Which statement is most likely to be helpful in correcting this student's misconception? a) Only favourable adaptations have survival value. b) Spontaneous mutations can result in the appearance of new traits. c) Disuse of an organ may lead to its eventual disappearance. d) Characteristics acquired during an organism's life are generally not passed on through genes. 2. Starting from the wild mustard Brassica oleracea, breeders have created the strains known as Brussels sprouts, broccoli, kale, and cabbage. Therefore, which of the following statements is correct? a. Heritable variation is low in wild mustard—otherwise this wild strain would have different characteristics. b. In wild mustard, most of the variation is due to differences in soil or other aspects of the environment. c. In this wild mustard, there is enough heritable variation to permit these different varieties. d. Natural selection is rare in wild populations of wild mustard. 3. All of the following are part of a prokaryotic cell except A. a cell wall B. a plasma membrane C. ribosomes D. an endoplasmic reticulum 4 . When a cell is in equilibrium with its environment, which of the following occurs for substances that can diffuse across the cell membrane? A. There is random movement of substances into and out of the cell B. There is directed movement of substances into and out of the cell C. There is no movement of substances into and out of the cell D. All movement of molecules is directed by active transport 5. When a plant cell is hypotonic with respect to its environment, which of the following occurs? A) There is net movement of water into the cell B) There is net movement of water out of the cell C) There is no net movement of water into or out of the cell D) Plasmolysis E) B and D...