Multiple choice

Which of the following has the body description 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 tube is a type of body plan in animals. The organism has two openings, one for food and one for the elimination of waste, it has  a specialized digestive system.