Which is not part of the description for communication? a. sending a signal b. learning to signal c. responding to a signal d. receiving a signal

because they want 2 and yea

oxygen +1 most likely

what in the weirdo : o

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.