Do you believe gender roles are biologically or socially constructed? In other words, are there just some things that women are good at and some things that men are good at?

Gender roles are a mix of both. They are socially constructed for the benefit of control and power, but biologically men do have the advantage physically. But woman have the advantage mentally.

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.