Pollen grains of cotten and many other species germinate readily on the stigma, but burst rapidly if floated upon pure water or a dilute sugar solution. explain

If pollen grains of cotton and many other species germinate readily on the stigma but burst rapidly if floated upon pure water or a dilute sugar solution, then this happened because of the skills the stigma has. The stigma helps the germination of the pollen. 

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.