Exam 3 Key - Bio 311D - Exam 3 Introductory Biology II...

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Unformatted text preview: Bio 311D - Exam 3 Introductory Biology II Spring 2008 1 Name: ________________________________________ EID:_________________ Select the best answer for the following questions and fill in the corresponding bubble on the answer sheet in PENCIL. Please answer the short answer and essay questions directly on your exam in PEN (if you wish to be considered for regrade-ing). Take a deep breath and Good Luck!! Multiple Choice (2pts each) 1. Bryophytes have all of the following characteristics except A) multicellularity. B) specialized cells and tissues. C) lignified vascular tissue. D) a reduced, dependent sporophyte. 2. The leaflike appendages of moss gametophytes may be one- to two-cell-layers thick. Consequently, which of these is least likely to be found associated with such appendages? A) cuticle B) chlorophyll C) stomata D) lysosomes 3. Which of the following is an ongoing trend in the evolution of land plants? A) decrease in the size of the leaf B) reduction of the gametophyte phase of the life cycle C) elimination of sperm cells or sperm nuclei D) increasing reliance on water to bring sperm and egg together 4. What is typically the result of double fertilization in angiosperms? A) The endosperm develops into a diploid nutrient tissue. B) A triploid zygote is formed. C) Both a diploid embryo and triploid endosperm are formed. D) Two embryos develop in every seed. 5. Fruits develop from A) microsporangia. B) endosperm. C) fertilized eggs. D) ovaries. 6. Which part of a plant absorbs most of the water and minerals taken up from the soil? A) taproots B) root hairs C) the thick parts of the roots near the base of the stem D) storage roots Bio 311D - Exam 3 Introductory Biology II Spring 2008 2 7. Which of the following types of plants is not able to self-pollinate under any circumstances ? A) dioecious B) monoecious C) wind-pollinated D) insect-pollinated 8. The most immediate potential benefits of introducing genetically modified crops include A) increasing the amount of land suitable for agriculture. B) overcoming genetic incompatibility. C) increasing the frequency of self-pollination. D) increasing crop yield. 9. The development of Bt crops continues to cause concern because A) Bt crops have been shown to be toxic to humans. B) if genes for Bt toxin "escape" to related weed species, the hybrid weeds could have harmful ecological effects. C) Bacillus thuringiensis is a pathogen of humans. D) Bt toxin reduces the nutritional quality of crops. 10. As a kid, you drive a nail in the trunk of a young tree that is 3 meters tall. The nail is about 1.5 meters from the ground. Fifteen years later, you return and discover the tree has grown to a height of 30 meters. The nail is now ________ meters above the ground....
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This note was uploaded on 10/27/2008 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas at Austin.

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Exam 3 Key - Bio 311D - Exam 3 Introductory Biology II...

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