Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305544703
Author: STARR
Publisher: Cengage
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Chapter 42, Problem 3CT
Summary Introduction
To explain: Tumors from germ cells contain any type of tissue, whereas the tumors from somatic cells have only limited number of tissues.
Concept introduction: Uncontrolled growth of cells due to the defects in the cell cycle results in tumors. Tumors can be benign or malignant. The gastrula has three germ layers. The germ layers undergo organogenesis to form the organ systems, and finally form the complete organism.
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Chapter 42 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 42 - The end product of cleavage is a __________. a....Ch. 42 - The outermost germ layer in a vertebrate gastrula...Ch. 42 - Prob. 3SQCh. 42 - Match each term with the most suitable...Ch. 42 - In humans, fertilization typically occurs in the...Ch. 42 - The ________, a fluid-filled sac, surrounds and...Ch. 42 - Prob. 1DAACh. 42 - Prob. 2DAACh. 42 - Prob. 3DAACh. 42 - Birth Defects and Multiple Births A woman who...
Ch. 42 - The placenta consists of __________. a. embryonic...Ch. 42 - During the fetal period, ____________. a....Ch. 42 - Prob. 9SQCh. 42 - Match each hormone with its action(s). ______...Ch. 42 - Prob. 11SQCh. 42 - Prob. 12SQCh. 42 - Prob. 13SQCh. 42 - Prob. 14SQCh. 42 - Prob. 15SQCh. 42 - The rubella virus causes German measles. If a...Ch. 42 - Prob. 2CTCh. 42 - Prob. 3CT
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- Figure 10.13 Rb and other proteins that negatively regulate the cell cycle are sometimes called tumor suppressors. Why do you think the name tumor suppressor might be appropriate for these proteins?arrow_forwardWhy is cell furrowing important in cell division? If cytokinesis did not occur, what would be the end result?arrow_forwardAnother model, the random model, proposes that any cell in a malignant tumor has the potential to form a new tumor. Does the cancer stem cell hypothesis contradict this idea?arrow_forward
- Explain the difference between asymmetric and symmetric cell division. When the pool of stem cells for a particular tissue needs to expand, which of these two cell division mechanisms is utilized?arrow_forwardWhat would happen if apoptosis (cell death) did not occur in cells that have significant DNA damage?arrow_forwardDescribe what a telomere is, and explain its role in cancer cells’ unlimited ability to divide.arrow_forward
- determine which statements is either tumor supressor or proto oncogenearrow_forwardWhy do you think apoptosis occurs by a different mechanism from the cell death that occurs in necrosis? What might be the consequences if apoptosis were not achieved in such a neat and orderly fashion, whereby the cell destroys itself fron within and avoids leakage of its contents into the extracellular space?arrow_forwardWhich stage of mitosis is critical or important in both animal and plant cells? Why?arrow_forward
- The “Hayflick limit” is the number of times cells growing in tissue culture will divide before cell proliferation ceases. What experimental procedure can be employed to remove this limit?arrow_forwardCell division and apoptosis a) The cell cycle is divided into different phases (named M, G0, G1, S and G2). Can you explain what happens during the different parts of the cycle and how to control it? b) What is the difference between apoptosis and necrosis? c) What are caspases and what is their function in the cell?arrow_forwardShown here are two HeLa cancer cells that are just completing cytokinesis. Explain how the cell division of cancer cellslike these is misregulated. Identify genetic and other changesthat might have caused these cells to escape normal cell cycleregulationarrow_forward
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