Most resistance biological material is
Or
An organic substance that can withstand enviornmental extremes and cannot be degraded by any enzyme is

An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

An organic substance that can withstand environ mental extremes and cannot be degraded by any enzyme is

Most resistant biological material is:

The most resistant biological material is

The exine of a pollen grain is composed of one of the most resistant biological matieral by which pollen grains are able to withstand extremes of temperature and dessication and cannot be degraded by any enzyme is

The exine of a pollen grain is composed of one of the most resistant biological matieral by which pollen grains are able to withstand extremes of temperature and dessication and cannot be degraded by any enzyme is

The exine of a pollen grain is composed of one of the most resistant biological matieral by which pollen grains are able to withstand extremes of temperature and dessication and cannot be degraded by any enzyme is