Which ducts transfer spermatozoa from rete testis to the epididymis?

What is rete testis?

Which mode of transfer of heat is quickest?

Give two examples where there is transfer of matter from terrestrial to aquatic ecosystem or vice-versa.

The transfer of pollen grains from the anther to the stigma of the another flower of the same kind is known as ____.

Which metal is extracted from haematite ?