Multiple choice

Match the following:

a. Acoelomates 1. They have a true body cavity or coelom which originates from the mesoderm and is lined by epithelial cells of mesodermal origin.
b. Pseudocoelomates 2. They do not have a body cavity, because the space between the body wall and digestive tract is filled with parenchymatous tisue.
c. Coelomates 3. They have a cavity between the body wall and digestive tract, but this cavity does not arise from the mesoderm and is not lined by epithelial cells.

  1. a - 2, b - 1, c - 3

  2. a - 3, b - 2, c - 1

  3. a - 2, b - 3, c - 1

  4. a - 1, b - 3, c - 2

  5. a - 1, b - 2, c - 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option. Acoelomates do not have a body cavity, because the space between the body wall and digestive tract is filled with parenchymatous tisue. Pseudocoelomates have a cavity between the body wall and digestive tract, but this cavity does not arise from the mesoderm and is not lined by epithelial cells. Coelomates have a true body cavity or coelom which originates from the mesoderm and is lined by epithelial cells of mesodermal origin.

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