The pony express was a popular method of moving the mail quickly in the mid-1800s. suppose a pony's momentum is calculated to be the mass of the pony is 450 kg. what is the magnitude of the pony's velocity?

i think it is d. objects resist changes in their state of motion.

the answer to the blank provided is “an autosomal gene that is required for the expression of genes on the x chromosome”.

testis-determining factor, abbreviated as td, which is more popularly known as sex-determining region y or sry protein, is a dna-binding protein or  gene-regulatory protein/transcription factor, encoded by the  sry gene. it is the gene responsible for the initiation of male gender determination in humans.