Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 27, Problem 5RQ
During embryonic development, unique cell layers develop into specific groups of tissues or organs during a stage called _____________.
- the blastula stage
- the germ layer stage
- the gastrula stage
- the organogenesis stage
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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…
What are Clathrin coated vesicles and what is their function?
How is a protein destined for the Endoplasmic Reticulum (ER), imported into the ER? Be concise.
Chapter 27 Solutions
Biology 2e
Ch. 27 - Figure 27.5 If a Hox 13 gene in a mouse was...Ch. 27 - Figure 27.6 Which of the following statements is...Ch. 27 - Figure 27.9 Which of the following statements...Ch. 27 - Which of the following is not a feature common to...Ch. 27 - During embryonic development, unique cell layers...Ch. 27 - Which of the following phenotypes would most...Ch. 27 - Which of the following organisms is most likely to...Ch. 27 - Which of the following is not possible? radially...Ch. 27 - An animal whose development is marked by radial...Ch. 27 - Consulting the modern phylogenetic tree of...
Ch. 27 - Which of the following is thought to be the most...Ch. 27 - As with the emergence of the Acoelomorpha phylum,...Ch. 27 - Which of the following periods is the earliest...Ch. 27 - What type of data is primarily used to determine...Ch. 27 - The time between 542-488 million years ago marks...Ch. 27 - Until recent discoveries suggested otherwise,...Ch. 27 - Plant life first appeared on land during which of...Ch. 27 - Approximately how many mass extinction events...Ch. 27 - Why might the evolution of specialized tissues be...Ch. 27 - Describe and give examples of how humans display...Ch. 27 - How have Hox genes contributed to the diversity of...Ch. 27 - Using the following terms, explain what...Ch. 27 - Explain some of the advantages brought about...Ch. 27 - Describe at least two major changes to the animal...Ch. 27 - How is it that morphological data alone might lead...Ch. 27 - Briefly describe at least two theories that...Ch. 27 - How is it that most if not all, of the extant...
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