During the Civil War, Harriet Tubman was
a nurse on the battlefield.
a spy for the Confederacy.
a railroad employee.
a spy for the Union.

porter is writing economic history because he is focusing on the cost of developing vaccines.

the anterior pituitary gland produces the following hormones and releases them into the bloodstream: psychotropic hormone, which stimulates the adrenal glands to secrete steroid hormones, principally cortisol. growth hormone, which regulates growth, metabolism and body       hope i

equal area projections

equal-area projection. a projection in which regions on the earth's surface that are of equal area are represented as equal.