Which of the following statement concerning coelenterate is incorrect?

Colenterates are mostly marine organisms

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Obelia is a trimorphic organism

No worries! We‘ve got your back. Try BYJU‘S free classes today!

They exhibit polymorphism

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Polyps are free-swimming forms

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D Polyps are free-swimming forms
Coelenterates are aquatic organisms that are mostly marine dwelling. They are diploblastic and have a tissue level of organization. Some colonial cnidarians like Obelia are trimorphic, having three kinds of zooids- polyps, blastostyles, and medusae. The occurrence of more than one type of individual in their colonies performing different functions is called polymorphism. Some coelenterates like Obelia show metagenesis, alternation of asexual phase (polyps), and sexual phase (medusae) in the life cycle. Polyps are attached forms, while medusae are free-swimming.

Suggest Corrections

Similar questions

62. Which of the following statements are true with respect to marine organisms?

1. Periphytons are the unattached organisms which live at air-water interface

2. Planktons are free floating species with limited powers of locomotion

3.Blue whale is Benthic organism

Options:

75. Which of the following statements are true with respect to Seaweeds?

i) Seaweed form important component of marine living organisms.

ii) They are found mostly in deep seas.

iii) It is also used as food, fodder, fertilisers and other industrial and pharmaceuticals products.

Join BYJU'S Learning Program