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. | 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. |
Animals with the type of embryonic development shown in the given diagram are:
1. Holometabolous
2. Paurometabolous
3. Protostomes
4. Dueterostomes
1. | Body will be bilaterally symmetrical |
2. | Muscle will be well developed |
3. | A true coelom will be present |
4. | Both will have cells organized into tissues and heterotrophic nutrition |