Why was texas able to become a leader in the areospace indusrty

When did paul zoll develop cardiac pacemaker

The segments shown below could form a triangle.

Which of the following was not an effect of westward expansion? a. native american tribes suffered confinement on reservations. b. native americans learned new techniques of irrigation. c. many native americans died from the spread of disease. d. natural resources were depleted from misuse by white settlers.