Uppose that a glutamine residue in the active site of an enzyme was mutated to alanine. As expected, the alanine mutant was inactive, suggesting that the glutamine residue was critical to the catalytic mechanism. Which mutation is most likely to restore wild-type level of activity to the alanine mutant?

The utilitarian gathering in Glutamine amino corrosive is - CONH2. On the off chance that we consider that the useful gathering is responcible for compound action the plausible transformation is well on the way to reestablish wild-type level of movement to the alanine freak is change to comparable useful gathering containing amino corrosive Asparagine (N).

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.

the answer is "a.) well–developed vascular system."

explanation: