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Unformatted text preview: Plant Science 1203L Laboratory 3 - Plant Leaves Answers 1. Use the laboratory handout to identify the external structure of monocot and dicot leaf structure. Observe the different leaves and identify the margin, lamina, veins, petiole, leaf base, and the node where the leaf is attached to the stem of the plant. Do some of the leaves appear to have a “hairs” on the blade or petiole? These structures are called trichomes. 2. Several examples of leaves will be provided for you to examine. Observe the vein patterns of the various leaves and determine if the patterns form a network ( netted veination ) or that the veins run parallel ( parallel veination ) to each other. Netted vein patterns are typical of Dicotyledon plants while parallel vein patterns are typical of Monocotyledon plants. As you examine the leaves, list the plant as either monocot or dicot below. Monocot Dicot A B C F D G E H 3. Below are diagrams of Dicot and Monocot leaf cross sections. Using the lab poster and handouts label the diagrams where indicated. 4. Your instructor will show you how to make an epidermal peel of a leaf. As a class observe the differences in4....
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This note was uploaded on 04/29/2008 for the course PLSC 1203L taught by Professor Longer during the Spring '08 term at Arkansas.
- Spring '08