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Read the following statements and choose the follwoing option: 1. Echinus are included in phylum echinodermata 2. Echinoderms exhibit two kinds of symmetry in their lifetime. 3.The most distinctive feature of echinoderms is the presence of water vascular system which helps in locomotion, capture and transport of food and respiration. 4.Fertilisation is usually external. 5.Development is indirect with free-swimming la

Options

  1. ABoth 1 and 3 is incorrect
  2. BOnly 5 is correct
  3. COnly 2 is correct
  4. DAll are correct

Correct answer

D. All are correct

Step-by-step solution

Echinoderms have an endoskeleton of calcareous ossicles and, hence, the name Echinodermata example, Echinus.The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical hence exhibit two kinds of symmetry in their lifetime.

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