Human Biology: Concepts and Current Issues (8th Edition)
Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Chapter 22, Problem 12TY
Summary Introduction

Introduction:

Categorizing organisms on the basis of their characteristics is called taxonomy. Many systems of classification were proposed and used until the currently used system was proposed. In 1969, R. H. Whitaker proposed five kingdom classification system, which was further modified to reflect phylogenetic, systematic, and cladistic similarities. Domain, kingdom, phylum, class, order, family, genus, and species is now the worldwide accepted system for taxonomy.

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Spirochaetes are free-living, anaerobic bacteria that contain spiral-shaped cells. Nematodes are roundworms that are incredibly diverse and, as a group, have adapted to survive in all environments. Which of the following statements accurately describes the DNA of both groups? A. The spirochaete genome is smaller than the nematode genome. B. Nematode DNA is circular. C. Spirochaete chromosomes are composed of just DNA while nematode chromosomes also include specialized proteins. D. Spirochaete DNA is linear.
Spirochetes are free-living, anaerobic bacteria that contain spiral-shaped cells. Nematodes are roundworms that are incredibly diverse and, as a group, have adapted to survive in all environments. Which of the following statements accurately describes the DNA of both groups? A. The spirochaete genome is smaller than the nematode genome. B. Nematode DNA is circular. C. Spirochete chromosomes are composed of just DNA while nematode chromosomes also include specialized proteins. D. Spirochete DNA is linear.
Which of the following is organisms is NOT eukaryotic? a. amoeba  b. centipede  c. bacteria d. earthworm

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Human Biology: Concepts and Current Issues (8th Edition)

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