In a cladogram, what occurs at a node?
a derived trait appears.
evolution is stopped.
an ancestor dies.
the cladogram ends.

A derived trait appears.

A cladogram is a diagram which is used to show evolutionary relationships among organisms. Each node in a cladogram represents a common ancestor that gives rise to descendants. It represents the similarity in traits from the ancestors to the descendants.

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.

there’s no image attached but i can if you want: )