Biology: Concepts and Investigations
Biology: Concepts and Investigations
3rd Edition
ISBN: 9780073525549
Author: Mariëlle Hoefnagels Dr.
Publisher: McGraw-Hill Education
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Chapter 17, Problem 13WIO

(a)

Summary Introduction

To determine:

Do the bacteria in the probiotics survive through the mouth, stomach and small and large intestine.

Concept introduction:

Probiotics are live microbes like bacteria and yeast that are taken as supplements to boost ones health. They improve the natural biota of bacteria in the human gut and also improve the functioning of the digestive system. They are known to improve the immune system too.

(b)

Summary Introduction

To determine:

Do probiotics promote health.

Concept introduction:

Probiotics are live microbes like bacteria and yeast that are taken as supplements to boost ones health. They improve the natural biota of bacteria in the human gut and also improve the functioning of the digestive system. They are known to improve the immune system too.

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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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Biology: Concepts and Investigations

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