Multiple choice

Consider the following statements regarding different types of animals-

  1. Cnidarians are acoelomate
  2. All sponges (Porifera) are marine
  3. Flatworms (Platy helminthes) can reproduce asexually
  4. In arthropods, fertilization is always internal Which of these statement is/are correct?

  1. 1, only

  2. 1 and 3

  3. 2, 3 and 4

  4. 2 and 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cnidarians (jellyfish, sea anemones) have a simple body organization without a true coelom, making them acoelomate. Some sponges like Spongilla inhabit freshwater, so not all are marine. Flatworms can reproduce asexually through transverse fission. Many arthropods like crustaceans have external fertilization where eggs are released into water.

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