Multiple choice

Which of the following has body type of ‘Tube within a tube’?

  1. Sea anemone

  2. Leech

  3. Ameoba

  4. Sycon

  5. All of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tube within-a tube-plan: This type of body plan is found in more complex animal groups. The animals with this body plan posses a digestive canal having two openings at the ends. The openings at the anterior end is mouth through which food enters the digestive canal, at the posterior end anus is present meant for ingestion of undigested waste matter. The digestive canal; is present inside the body cavity and hence, this body plan is termed as the tube within a tube.

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