morphanat - wrong right score 0 1 2 3 4 5 6 7 8 9 10 11 12...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
wrong 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 right 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 score 100 98.8 97.5 96.3 95.1 93.8 92.6 91.4 90.1 88.9 87.7 86.4 85.2 84.0 82.7 81.5 80.2 79.0 Morphology & Anatomy Name_______________________________ The purpose of this exercise is to briefly examine a few plants to become familiar with their external morphology (study of form) and internal anatomy (how they are put together inside). But before we begin, let us first determine what organism is meant by the word "plants." Unfortunately the concepts of organisms and species have changed drastically through the years. In the dark ages, botanists were blissfully ignorant and woefully unequipped to see the structure of plants. Leeuwenhoek had not yet invented the microscope. Scientists considered only two types of organism: animals and plants. It was easy to tell a plant from an animal in those days: animals were not usually green and could move while plants were usually green and could not move. Of course we now know that not all plants are green and many can move. Moreover some animals are green and many do not locomote. Thus, in ancient times many organisms such as blue-green algae, fungi, and algae were considered plants. We now know that these are not true plants and will not consider them in this exercise. Instead our examination is limited to the vascular plants: organisms possessing three vegetative organs: root, stem, and leaf. Throughout this exercise you will be asked to make drawings. These are not to be artistic renderings of the subject, but are to be functional diagrams. You should bring with you and use a sharp pencil to make the drawings. You should draw the outline shape of the objects you observe without any type of shading or color. Your drawing should be LARGE so that all of the important fine structures are clearly rendered. Every important structure must be labeled. In this exercise, the structures to be labeled are indicated in bold type. Before handing your drawings to the instructor for examination, BE SURE that you have labeled all of the structures indicated. Spend no more than 20 minutes making each drawing. I. Morphology of the bean plant: Phaseolus vulgaris . A. The leaves are broad at the blade and are attached to the stem by means of a stalk-like petiole . The leaf may be simple (have only one blade per petiole) or compound (usually three blades per petiole). There may be two simple leaves or one compound leaf attached at a spot on the stem called a node . The veins of each leaf blade are arranged into a complicated network. Where the stem and leaf join, there is a swollen area of the petiole ( pulvinus ) that is responsible for leaf movements. At night the bean leaves fold together and down toward the soil; at dawn the leaves unfold and are lifted into the sun. You may see this process dramatically on the sensitive plant (
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/04/2011 for the course BSC 2010 taught by Professor Thomas during the Spring '07 term at University of Central Florida.

Page1 / 9

morphanat - wrong right score 0 1 2 3 4 5 6 7 8 9 10 11 12...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online