Phylum Rotifera

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| By Colleennicole

Colleennicole

Community Contributor

Quizzes Created: 21 | Total Attempts: 35,736

Questions: 7 | Attempts: 723 | Updated: Mar 22, 2023

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A phylum is a biological term for a level of classification below Kingdom and above Class; rotifers are what make up the phylum of microscopic pseudocoelomate animals. What can you tell us about them? Let’s take a look.

Questions and Answers

1.

Those in Phylum Rotifera have a characteristic ________ crown.

Explanation
Phylum Rotifera is a group of microscopic, multicellular organisms that have a unique characteristic called a cilia crown. Cilia are tiny, hair-like structures that surround the mouth of these organisms and are used for various functions such as locomotion and feeding. The cilia crown is a defining feature of Phylum Rotifera and distinguishes them from other organisms.

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2.

Those in Phylum Rotifera are usually associated with _______ ___________.

Explanation
Rotifers are microscopic aquatic animals that are commonly found in freshwater environments. They have a preference for living near or on aquatic vegetation, such as algae or submerged plants. This association with aquatic vegetation provides rotifers with a source of food and shelter. The vegetation provides a surface for them to attach to and also serves as a habitat for other small organisms that rotifers can feed on. Therefore, the presence of rotifers is often an indicator of a healthy aquatic ecosystem with abundant vegetation.

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3.

Those in Phylum Rotifera make a up a large portion of ______, and live between sandgrains on beaches.

Explanation
Phylum Rotifera refers to a group of organisms that are part of the meiofauna, which includes small animals that live in the spaces between sand grains on beaches. Therefore, the correct answer is meiofauna.

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4.

__________ live in open water and may exhibit ___________ (changes in cycles).

Explanation
The term "pelagic" refers to organisms that live in open water, such as the open ocean. The term "cyclomorphosis" refers to the ability of certain organisms to exhibit changes in cycles, such as changes in their morphology or behavior in response to environmental conditions. Therefore, the correct answer is "Pelagic, cyclomorphosis" because it accurately describes organisms that live in open water and have the ability to exhibit changes in cycles.

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5.

They're body consists of a ________, ________, and _____.

Explanation
The body of the organism being referred to consists of three parts: the corona, the trunk, and the foot.

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6.

The corona is found on the
- A.
  
  Anterior
- B.
  
  Posterior
Correct Answer
A. Anterior

Explanation
The corona is found on the anterior part of the body.

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7.

An example of Rotifera is __________.

Correct Answer
Philodena

Explanation
Rotifera is a phylum of microscopic, multicellular animals commonly known as rotifers. Philodena is a genus within the phylum Rotifera, making it an example of Rotifera.

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