Darwin studied actual birds on the galapagos islands instead of using a simulation, as you did in this lab. studying natural selection in the field can be challenging. list at least three possible challenges darwin might have faced.

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.

not only is it colder, it also becomes darker, less salty, and more dense.

the fossil record provides evidence of a common ancestor to many species.