CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
3rd Edition
ISBN: 9780135191811
Author: Urry
Publisher: PEARSON
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Chapter 28.3, Problem 2CC
Summary Introduction

To determine:

Whetherthe mesophyll of a plant species that has vertically oriented leaves could be divided into spongy and palisade layer.

Introduction:

A leaf comprises stomata for the exchange of CO2 and O2 between the surrounding air and inside the leaf. Stomata are the pores that can interrupt the epidermis of leaves. The entire area of stomata consists two epidermal cells: guard cells and mesophyll.

The mesophyll is a ground tissue of a leaf. Its middle layer is located between upper and lower epidermal layers. Mesophyll consist parenchyma cells for photosynthesis. The mesophyll cells have two distinct layers: palisade and spongy.

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After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.) After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.)   Data Table 1Stage    Totals    PercentInterphase        Mitosis:        Prophase        Metaphase        Anaphase        Telophase        Cytokinesis        Totals    100    100% To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…
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