A diagram of the digestive system is shown below.

What is the main function of the digestive system?
A.
to break down food into nutrients that can be circulated throughout the body
B.
to exchange oxygen and carbon dioxide gases within the body
C.
to send signals from one part of the body to other parts of the body
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A. To break down food into nutrients that can be circulated around the body. :)

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.