In which of the following gametophyte is not
independent free living ?

Which one one of the following matches is correct ?

Cryopreservation of gametes of threatened species
in viable and fertile condition can be referred to as:-

Which of the following endoparasites of humans
does show viviparity ?

Which of the following is the correct sequence of events in the origin of life?

I. Formation of protobionts

II. Synthesis of organic monomers

III. Synthesis of organic polymers

IV. Formation of DNA-based genetic systems

The chronological order of human evolution from early to the recent is