Https://normas-apa. Org/ NORMAS APA 1.- Que son las norma APA 2.- Citar los siguientes aspectos: - Márgenes - La Fuente - Interlineado - Tipo de papel - Como citar el encabezado - Alineación !Ayuda urgente¡

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

cell/ tissue/ organ/ organ system/ body

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.