Explain why more closely related organisms have more similar cytochrom c.

Written below.

Explanation:

More closely related organisms will have more similar cytochrome c because they have a more recent common ancestor. The more recent the common ancestor, the less time for DNA mutations to occur. Changes in DNA lead to changes in mRNA leads to differences in protein amino acid sequences.

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.