Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 19.2, Problem 5TQ
Summary Introduction
To review:
The hypothesis that explains the reason for the time and depth distribution of marine Crenarchaeota.
Introduction:
The evolution of mesophiles may have occurred from hyperthermophiles by the process of gene acquisition from mesophilic bacteria. The majority of Crenarchaeota grow in water, soil or in association with plants. In a survey conducted in 2001, a high number of Crenarchaeotes were found in the ocean. The availability varied seasonally and with depth.
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Question 14
You are working on a summer internship with a famous marine scientist.
Your job is to use your microscope to examine and identify specimens
based on morphology. You also have some chemical analysis result. While
examining a specimen, you notice:
• it contains collagen and proteogylcans
• it has three tissue layers, but no coelom
• it was observed as a parasite inside the tissues of another organism
you collected
Which of the following taxonomic groups best matches this description?
OOOO
οι οιο
Phylum Annelida
Phylum Apicomplexa
Phylum Arthropoda
Phylum Bacillariophyta
Phylum Cnidaria
Phylum Echinodermata
Phylum Mollusca
Phylum Nematoda
Phylum Platyhelminthes
Chapter 19 Solutions
Microbiology: An Evolving Science (Fourth Edition)
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