Pollen grains are able to tolerate extremes of temperature and desiccation because their exine consists of

Pollen grains are able to tolerate extremes of temperatures and desiccation because their exine consists of

Pollen grains are able to tolerate extremes of temperature and desiccation as its exine is made of

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

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 materials by which pollen grains are able to wihstand extremes of temperature and dessication and cannot be degraded by any enzyme, is

Conifers are adapted to tolerate extreme environment condition because of