Statement I: | All members of Animalia are multicellular. |
Statement II: | All members of Animalia exhibit the same pattern of organisation of cells. |
I: | The digestive system in Platyhelminthes has only a single opening to the outside of the body that serves as both mouth and anus, and is hence called incomplete. |
II: | In open type circulation, the blood is pumped out of the heart and the cells and tissues are directly bathed in it. |
1. | An open circulatory system | 2. | A closed circulatory system |
3. | A lymphatic system | 4. | A portal circulation |
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. |
Statement I: | Coelenterates, ctenophores and echinoderms have bilateral symmetry as larvae and radial symmetry as adults. |
Statement II: | Animals like annelids and arthropods exhibit bilateral symmetry. |
1. | Statement I is correct; Statement II is incorrect |
2. | Statement I is correct; Statement II is correct |
3. | Statement I is incorrect; Statement II is incorrect |
4. | Statement I is incorrect; Statement II is correct |
1. | Ectoderm | 2. | Mesoderm |
3. | Endoderm | 4. | Gastroderm |
Statement I: | An undifferentiated layer, mesoglea, is present in between the ectoderm and the mesoderm in diploblastic organisms. |
Statement II: | A third germinal layer, endoderm, in between the ectoderm and mesoderm, is present in triploblastic animals. |
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 |