Which of the following statements best describes how science has developed over time?
A. Until 50 years ago, only men made contributions to scientific
knowledge. B. All useful scientific knowledge has been developed within the past
100 years.
C. Worldwide, scientists work independently to build the scientific
knowledge within their own countries.
D. Men and women all over the world have investigated scientific
questions throughout history.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

b ti isnfornopgnoernfrof

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.