Statement I: | Sponges exhibit a cellular level of organization. |
Statement II: | Cnidarians have a tissue level of organization. |
I: | Platyhelminthes |
II: | Mollusca |
III: | Annelida |
1. | Only I | 2. | Only II |
3. | Only II and III | 4. | I, II, and III |
1. | An open circulatory system | 2. | A closed circulatory system |
3. | A lymphatic system | 4. | A portal circulation |
1. | Bilateral symmetry | 2. | Three embryonic layers |
3. | Incomplete digestive system | 4. | Coelom |
1. | Ectoderm | 2. | Mesoderm |
3. | Endoderm | 4. | Gastroderm |
I: | Bilateral symmetry is the body plan where the body of the animal can be divided into two identical halves through any plane passing through the central axis of the body. |
II: | While Ctenophores and adult Echinoderms have bilateral symmetry, Annelida and Arthropods have radial symmetry. |
I: | This is seen in sponges, cnidarians, ctenophores and larval echinoderms. |
II: | This type of body symmetry is generally seen in animals which move actively in their environment. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
Consider the given features:
A: | Body cavity lined by mesoderm |
B: | The mesoderm present as scattered pouches in between the ectoderm and the endoderm |
Select the correct option of animals having the features A and B:
A | B | |
1. | Aschelminthes | Annelids |
2. | Platyhelminthes | Ctenophores |
3. | Arthropods | Molluscs |
4. | Arthropods | Aschelminthes |
I: | The body is divided into segments only externally. |
II: | There is a serial repetition of at least some organs. |