Give some examples of rooted floating stage?

Write some examples of crustose lichens stage.

The chemistry of the actinoid elements is not so smooth as that of the lanthanoids. Justify this statement by giving some examples from the oxidation state of these elements.

Give some examples of force of friction.

Give some examples of hospital wastes.

Give some example of fixed and hinge joints.

Define a taxon. Give some examples of taxa at different hierachical levels.

Give some examples of P.E. other than gravitatinoal P.E.