Planaria possess a high capacity of:
1. metamorphosis
2. regeneration
3. alternation of generation
4. bioluminescence
The figure shows four animals (a), (b), (c) and (d). Select the correct answer with respect to a common characteristic of two of these animals:
(a) | (b) | ||
(c) | (d) |
1. (c) and (d) have a true coelom
2. (a) and (d) respire mainly through body wall
3. (b) and (c) show radial symmetry
4. (a) and (b) have cnidoblasts for self-defence
One example of animals having a single opening to the outside that serves both as mouth as well as the anus is:
1. Octopus
2. Asterias
3. Ascidia
4. Fasciola
Which one of the following kinds of animals are triploblastic?
1. Flatworms
2. Sponges
3. Ctenophores
4. Corals
Biradial symmetry and lack of cnidoblasts are the characteristics of:
1. Starfish and sea anemone
2. Ctenoplana and Beroe
3. Aurelia and Paramecium
4. Hydra and starfish