Calcium is primarily absorbed from which area of the intestinal tract?
A) ileum B) stomach C) mouth D) duodenum
Question 2
The process of genetic modification involves
A) treating organisms with radiation and then combining or breeding them for desired effects.
B) preserving organisms until they can be treated to render them harmless.
C) distinguishing harmful microorganisms from harmless ones.
D) altering the DNA of an organism to bring about specific changes in its seeds or offspring.