Question

differentiate between the following diploblastic and triploblastic and annelids and arthropods warm blooded and cold blooded animals​

Answer 1

Answer:

Diploblastic:

1. Body wall develops from two embryonic germ layers- ectoderm and endoderms and persists as such in adult.                                                                       2. Non- cellular, gelatinous mesogloea is present in between ectoderm and endoderm.                                                                                                                                3. Coelom is absent, e.g. Hydra (coelenterates), sponges (Porifera).

Triploblastic:

1. Body develops from 3 germ layers- ectoderm,mesoderm and endoderms. 2. Mesogloea is absent and mesoderm is present.                                                     3. Coelom is present, e.g. platyhelminthes, annelids, arthropods, mollusks, echinoderms and chordates.

Annelida:

1. They have no distinct heads.

2. Exoskeletons are absent.

3. They have no jointed appendages.

4. Excretion occurs through nephridia.

5. Respiration occurs through skin or parapodia, e.g. earthworm, Aphrodite.

Arthropoda:

1. Body is divided into head, thorax and abdomen.

2. Body is covered by chitinous exoskeletons.

3. They have jointed appendages.

4. Excretion occurs through coxal gland on malpighian tubules.

5. Respiration occurs through tracheae or book lungs, e.g. prawn, cockroach.

Explanation: