Chapter 47 Questions-1

Chapter 47 Questions-1 - Ch 47 Multiple Choice Identify the...

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Ch 47 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Russian nesting dolls, which are a set of smaller dolls packed inside larger dolls, most resemble which one of the following developmental theories? a. epigenesis b. preformation c. cell differentiation d. morphogenesis e. cell theory ____ 2. You buy a pie that contains a mixture of cherries and blueberries. When you cut the pie up, you notice that some slices have more blueberries than cherries and other slices have more cherries than blueberries. This uneven distribution of cherries and blueberries is most like the uneven distribution of a. nuclei in a zygote. b. nuclei in an early embryo. c. nuclei in an egg. d. cytoplasmic determinants in a zygote. e. cytoplasmic determinants in an early embryo. ____ 3. A puppy is born with a malformed right leg. A veterinarian studies the animal and determines that all of the correct types of cells are present, but that the leg simply took on the wrong shape. This is most likely a problem of a. morphogenesis. b. cell differentiation. c. histogenesis. d. preformation. e. fertilization. ____ 4. As an embryo develops, new cells are formed and different types of cells develop by the process of a. differentiation and morphogenesis. b. preformation and cell differentiation. c. cell division and differentiation. d. preformation and morphogenesis. e. preformation and epigenesis. ____ 5. Fertilization of an egg without activation is most like a. placing the key in the ignition of a car but not starting the engine. b. resting during halftime of a basketball game. c. preparing a pie from scratch and baking it in the oven. d. walking to a store and buying some groceries. e. boarding a train in Chicago and riding it to Philadelphia. ____ 6. In some rare all-female salamander species, the females require the sperm from males of another species. However, the developing embryos show no signs of a genetic contribution from the sperm. In this case, the sperm appear to be used only for a. morphogenesis. b. epigenesis. c. egg activation. d. cell differentiation. e. the creation of a diploid cell. ____ 7. Which of the following is a function of the acrosome contents during fertilization?
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a. block polyspermy b. help propel the sperm toward the egg c. digest the exterior coats of the egg d. nourish the mitochondria of the sperm e. trigger the completion of meiosis by the sperm cell ____ 8. Which of the following statements is (are) true concerning the vitelline layer of the sea urchin egg? a. It is outside the fertilization membrane. b. It releases calcium, which initiates the cortical reaction. c. It has receptor molecules that are specific for binding acrosomal proteins. d.
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Chapter 47 Questions-1 - Ch 47 Multiple Choice Identify the...

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