Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 28, Problem 1IQ
The plastids of chlorarachniophytes are surrounded by four membranes and enclose a vestigial nucleus called a nucleomorph. What do these facts suggest?
Expert Solution & Answer
Summary Introduction
To explain: The facts that suggest the plastids of chlorarachniophytes are surrounded by four membranes and enclose a nucleomorph.
Introduction: Protists are microscopic organisms that belong to the kingdom “Protista”. These have been classified into various categories depending upon their mode of nutrition.
Explanation of Solution
The four membranes of chlorarachniophytes indicate the secondary symbiosis of a green alga. Green alga has chloroplasts that originated from the primary endosymbiont. Out of the four membranes of chlorarachniophytes, inner two membranes belong to the chloroplast of green algae. The third membrane belongs from the outer membrane of alga, and the outer membrane belongs from the heterotrophic eukaryotic food vacuole. The vestigial nucleus in the secondary symbiosis of a green alga specifies the process that occurred recently and the genetic sequence of the process toward the origin of green algae.
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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 28 Solutions
Study Guide for Campbell Biology
Ch. 28 - The plastids of chlorarachniophytes are surrounded...Ch. 28 - Sleeping sickness is caused by the kinetoplastid...Ch. 28 - Sleeping sickness is caused by the kinetoplastid...Ch. 28 - Prob. 4IQCh. 28 - Prob. 5IQCh. 28 - Prob. 6IQCh. 28 - Fill in the names of the two major clades and the...Ch. 28 - Prob. 8IQCh. 28 - Evidence indicates that all plastids (except for...Ch. 28 - Prob. 1TYKM
Ch. 28 - Prob. 2TYKMCh. 28 - Prob. 3TYKMCh. 28 - Prob. 4TYKMCh. 28 - Prob. 5TYKMCh. 28 - Prob. 6TYKMCh. 28 - Prob. 7TYKMCh. 28 - ________ flagella with spiral or crystalline rod;...Ch. 28 - Mixotrophs a. have unicellular and multicellular...Ch. 28 - According to the theory of secondary...Ch. 28 - Prob. 3TYKCh. 28 - Prob. 4TYKCh. 28 - Prob. 5TYKCh. 28 - Genetic variation is generated in the ciliate...Ch. 28 - Prob. 7TYKCh. 28 - Prob. 8TYKCh. 28 - Prob. 9TYKCh. 28 - Prob. 10TYKCh. 28 - Which supergroup includes the land plants? a....Ch. 28 - Prob. 12TYKCh. 28 - Prob. 13TYKCh. 28 - Prob. 14TYK
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