A bacterial cell is in a solution with a chemical gradient. The bacterial cell directs its movements in order to move toward the highest concentration of glucose molecules within the solution. This is an example of positive . A.
geotropism
B.
homeostasis
C.
phototaxis
D.
chemotaxis

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.

a- all cells come from pre-existing cells

not sure if this what   you'r looking for would be percent composition