Biology: Life on Earth with Physiology (11th Edition)
Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 40, Problem 7RQ
Summary Introduction

To determine:

The way through which the eye’s lens changes shape to allow focusing on distant objects.

Introduction:

Eyes help to see and view different objects by forming the image on the retina, a part of eye serves as a screen for the purpose of image formation. Accommodation in dark and light areas is a function of the eye. The eye is the sensitive part that provides vision. It consists of photoreceptor cells, such as rods and cone cells responsible for image formation in night and day.

Summary Introduction

To determine:

The defects that make focusing on a distant object impossible and name that condition.

Introduction:

Normal eyes focus at the cornea that has rounded contours helpful for bending the light rays. The lens plays an important role for final and sharp focusing. The encircling muscle adjusts the shape of the lens. Vision deficiencies occur due to the shape of the eyeball in the eyes.

Summary Introduction

To determine:

The type of lens used to correct it and also the ways through which the lens does so.

Introduction:

Both nearsighted (myopia) and farsighted (hypermetropia) conditions can be corrected with the help of lenses (with appropriate shaped lenses) and laser surgery (reshapes the cornea).

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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…

Chapter 40 Solutions

Biology: Life on Earth with Physiology (11th Edition)

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