Concept explainers
The term “metazoan” is synonymous with “multicellular animal.” Are there any single-celled animals? How are single-celled eukaryotes classified?
To determine: Are there any single-celled animals and to explain the way in which the single-celled eukaryotes are classified.
Introduction: The single-celled organisms, which are also called unicellular organisms, contain a single cell. They fall into two groups, namely eukaryotic organisms (protozoa, unicellular fungi, and unicellular algae) and prokaryotic organisms (bacteria and archaea).
Explanation of Solution
There are technically no single-celled animals, but many single-celled organisms come under Kingdom Protista. These organisms have many characteristics similar to animals. Some examples are Paramecium and Amoeba.
The single-celled organisms are termed as protozoans and are classified under Kingdom Protista.
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Chapter 12 Solutions
LooseLeaf for Integrated Principles of Zoology
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- One organism found in a termite’s gut is Mixotrichia paradoxa. This strange creature looks like a single-celled swimming ciliate under low magnification. However, the electron microscope reveals that it contains spherical bacteria rather than mitochondria and has on its surface, rather than cilia, hundreads and thousands of spirilla and bacilla bacteria. You are the scientists who first observed this organism. How would you describe this organism- single-celled? Aggregate? Colony? Multicellular? Can the structure of this organism give you any insight into the evolution of eukaryotic cells? (Hint: the endosymbiosis hypothesis)arrow_forwardwhat phylum does this organism belong to? what kingdom does this organism belong to? is this organism prokaryotic or eukaryotic?arrow_forwardAlgae and protozoans are loosely grouped together as protozoans and are different from plants because they lack certain characteristics of plants. Explain what differentiates algae from plants and two ways they are different from protozoans. Talk about algae being part of our environment and how algae may positively or negatively impact our health or the environment. (Words to use in your answer: cell wall, cell membrane, chloroplast, plankton, single-cell, multicellular, red tide, toxins, agar, phytoplankton, reproduction, motility, nutrition, feeding strategies)arrow_forward
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