This has mouth an lower side and anus on upper side

This has mouth on lower side and anus on upper side

This has mouth on lower side and anus on upper side

Assertion: During the course of evolution, alimentray canal is first completed in aschelminthes, circulatory system in annelids, and respiratory system in arthropods. Reason: In echinoderms, degestive system is complete with mouth on upper side and anus on the lower side.

a) Identify the invertebrate whose mouth is on ventral or lower side and anus is on dorsal or upper side. b) Mention the phylum. c) Comment on its General characters.

A tapping vessel opens in a tank like container that is tapering on the lower side. The tank has an outlet for water on the upper side and a water inlet on the lower side. Finely ground ore is released in the tank. A forceful jet of water is introduced in the tank from lower side and gangue particles and pure ore are separated by this method. i. The above description is of which gravitation separation method? ii. Draw labelled diagram of this method.

Answer the following questions: A tapping vessel opens in a tank like container that is tapering on the lower side .The tank has an outlet for water on the upper side a water inlet on the lower side. Finely ground ore is released in the tank. A forceful jet of water is introduced in the tank from lower side and gangue particles and pure ore are separated by this method. The above description is of which gravitation separation method ?