Quiz 4 Key - Tendrils – clinging to support Succulent leaves – water storage Reproductive leaves(Mother of thousands Bracts – attract

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Discussion Section Quiz 4 for Apr 7/Apr 8 1. (2pts) What is cation-exchange and how does it help plants obtain nutrients? Soil is negatively charged, so it binds mineral cations. Plants release protons, which displace the nutrient ions from the soil particles, making them available to the plant. 2. (2pts) What are two key differences between bryophytes and seedless vascular plants? The vascular plant life cycle has a dominant sporophytic stage, has vascular tissues (xylem and phloem), and organs such as roots and leaves. Bryophytes have a dominant gametophyte and no vascular tissues or roots/leaves. 3. (2pts) Give two examples of a leaf that has been modified for a purpose other than photosynthesis? Spines – protection
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Unformatted text preview: Tendrils – clinging to support Succulent leaves – water storage Reproductive leaves (Mother of thousands) Bracts – attract pollinators 4. (2pts) What is the difference between a lateral meristem and an apical meristem? Apical meristems are responsible for primary growth of shoots and roots. Lateral meristems contribute to the secondary growth – increasing girth of stems and production of lateral roots in roots. 5. (2pts) 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....
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This note was uploaded on 09/19/2011 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas at Austin.

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