39. the body needs in only small amounts, but these organic molecules are an important part in perform cellular reactions. (1 point) 40. when a person loses consciousness due to a head injury from a car crash, the keeps the body functioning by regulating the flow of information between the brain and the rest of the body. (1 point)

The answer to your questions are

39. Vitamins

40. Brain Stem

there are no details given

explanation:

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.