Question

5. Which one of the following is not a characteristic of phylum: Annelida
1) Closed circulation
2) Segmentation
3) Protonephridia
4) Ventral nerve cord​

Answer 1

Explanation:

Physical Adsorption or Physisorption

The characteristics of physisorption are: There is no specificity as any gas can be adsorbed onto the surface. It has been observed that highly liquifiable gases are physically adsorbed more strongly. It is reversible in nature and is dependent on pressure as well as temperature.

Answer 2

Answer:

3 protonephridia

Explanation:

protonephridia are flame cells, i.e; the excretory cells of flatworms. flames cells are a characteristic feature of Platyhelminthes and are not present in annelids