The instructions for building proteins necessary for all life functions are coded within an organism's genetic code. the genetic code of an organism consists of codons, or sequences of three nucleotides, that each code for a specific amino acid. amino acids are the building blocks of proteins. the amino acids coded by specific codons a. differ between members of different species. b. are almost universal among all living things. c. differ between plants and animals. d. are different for every organism on earth.

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.