Biology: Life on Earth (11th Edition)
11th Edition
ISBN: 9780134168296
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 25, Problem 1AC
Summary Introduction
To review:
Classification of hagfishes as vertebrates or invertebrates, the characteristics that decide the classification, whether it is important to place an organism in a group and the rationale behind this classification.
Introduction:
Hagfishes belong to the group Chordata. Chordates are the animals that have specific characteristics, namely a dorsal nerve chord, presence of a notochord, pharyngeal gill and post-anal tail. Based on other characteristics of the species, these animals are further divided into different subgroups.
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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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Chapter 25 Solutions
Biology: Life on Earth (11th Edition)
Ch. 25 - The two groups of mammals with the largest number...Ch. 25 - More than half of all vertebrate species are a....Ch. 25 - 3. Which of the following is not a characteristic...Ch. 25 -
4. Adult frogs and toads obtain oxygen...Ch. 25 -
5. Hagfishes
a. are predators of live...Ch. 25 - In chordates, the nerve cord is ________ and runs...Ch. 25 - Animals that are chordates but not vertebrates...Ch. 25 - Prob. 3FTBCh. 25 - Among tetrapod groups, hair is found in; the skin...Ch. 25 - The only mammals that lay eggs are. The only...
Ch. 25 -
1. Briefly describe each of the following...Ch. 25 - Prob. 2RQCh. 25 - List four distinguishing features of chordates.Ch. 25 - Describe the ways in which amphibians are adapted...Ch. 25 - 5. List the adaptations that distinguish reptiles...Ch. 25 - List the adaptations of birds that contribute to...Ch. 25 - 7. How do mammals differ from birds, and what...Ch. 25 - Prob. 1ACCh. 25 - Prob. 2AC
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