Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Chapter 3, Problem 4AC
Saliva from infected deer can transmit chronic wasting disease, caused by misfolded prion proteins. The infectious prions can persist in soil. How might the disease pass from an infected animal to others in the herd?
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Pathogens have a variety of traits that interact with a host and enable the pathogen to enter a host, adhere to host cells, gain access to nutrients, and escape detection or removal by the immune system. These traits are called virulence factors. The following enzymes and toxin can act as virulence factors and contribute to bacteria’s pathogenicity.
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Ascaris lumbricoides, commonly known as the human roundworm. It is a parasitic worm that infects about 772–892 million people worldwide. It belongs to a group of parasites known as soil-transmitted helminths (STH), which are spread through contact with contaminated soil. The adult worms live in the human intestine, where they can cause various health problems, especially in children. Infection usually occurs when a person consumes food or water contaminated with infective Ascaris eggs from soil. This is common in areas with poor sanitation and hygiene practices, especially in tropical and subtropical regions of Asia, sub-Saharan Africa, and the Americas (About Ascariasis, 2024).
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Chapter 3 Solutions
Biology: Life on Earth
Ch. 3 - Fill-in-the-Blank In organic molecules made of...Ch. 3 - 5. Fill in the following with the appropriate type...Ch. 3 - Fill-in-the-Blank Proteins are synthesized by a...Ch. 3 - Fill-in-the-Blank Till in the following with the...Ch. 3 - Fill-in-the-Blank A nucleotide consists of three...Ch. 3 - Prob. 1RQCh. 3 - List the four principal classes of biological...Ch. 3 - What roles do nucleotides play in living...Ch. 3 - Prob. 4RQCh. 3 - Prob. 5RQ
Ch. 3 - Prob. 6RQCh. 3 - Describe the synthesis of a protein from amino...Ch. 3 - Where in nature do we find cellulose? Where do we...Ch. 3 - Which kinds of bonds between keratin molecules are...Ch. 3 - In this chapter, you read that a phospholipid has...Ch. 3 - Prob. 2ACCh. 3 - Some people think that consuming fat and sugar...Ch. 3 - Saliva from infected deer can transmit chronic...Ch. 3 - In an alternate universe where people could digest...
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