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Unformatted text preview: 1-1 SPRING 2010 NAME _______________________________ BTNY21SECTION (DAY/TIME)_______________________ LABORATORY #1(OBSERVING AND DESCRIBING PLANTS) Welcome to your first BTNY 210 lab. We will be taking everyone’s picture at the beginning of lab today so as to help your TAs learn your names and faces. Geranium Pet Plant Project: Each week of lab will consist of a set of experiments to be conducted or samples to be observed. Additionally, for much of the semester you will have an exercise involving geranium each week. This short exercise will be tied to each week’s lab topic, but will relate to geranium. Lab #1 Objectives: 1) recognize the basic parts of the plant and learn the respective terminology 2) distinguish the 3 plant organs based upon their structural features 3) observe various modified plant organs and learn their functions 4) study the morphological variations of leaf structure To help you with this laboratory, you should look over the following pages in the textbook prior to coming to lab: pp. 136-141 (plant morphology), 156 (modified stems), 192-194 (leaf morphology), and 203-208 (modified leaves). A. INTRODUCTION TO THE MORPHOLOGY OF FLOWERING PLANTS 1. You are going to study a couple stages of corn and soybean seedling growth. Let’s first start with the small pots of corn seedlings located on your bench. Use the following terms to label the images below: coleoptile, primary root, branch root,andsimple leaf.Consult pg. 1-7 for definitions of these terms. 1-22. Examine the potted soybean seedlings at your bench. These seedlings are about 10 days old. Use the following terms to label the image below: apical meristem of the stem, hypocotyl, branch root, cotyledons, andprimary root. Again, consult the definitions on page 1-7 for terms you are not familiar with. 3. Your TA will distribute young soybean plant that are about 21 days old and young corn plants that are about 14 days old. Your task is to consider these plants carefully in the context of the lecture we have had on plant structure this week. On one side of a blank piece of paper sketch the soybean plant, and on the other side sketch the corn plant. Let’s recall that plants have three primary organs: roots, stems, and leaves. Are these three organs obvious when you look at your soybean and corn seedlings? Each organ has more than one possible part: Roots will always have primary rootsand branch roots(secondary roots), and a root apical meristem (RAM). The main part of a leaf will usually be the blade, but many leaves also have petiolesand/or stipules. Stems will always have nodes, internodesand meristems(axillary budsas well as the stem apical meristem [SAM])....
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- Spring '08