Scientists have successfully cloned animals, including large mammals such as sheep. which statement
provides the most likely reason that a human has not yet been cloned?
(1) humans have dna that is structurally very different from other mammals.
(2) cloning can only be performed on animals that normally reproduce asexually.
(3) human genes are made of too many different types of simple sugars.
(4) some people consider human genetic experiments unethical.

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.

. ph changes the ability of them he enzyme to dissolve in water.