A base has a PH less than, greater than, or equal to 7?

Solutions with a pH of less than 7 are acidic (the value of the concentration exponent is greater, because there are more hydrogen ions in the solution). On the other hand, alkaline solutions have a pH higher than 7. The solution is considered neutral when its pH is equal to 7, for example water.

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.