Which of the following is true about both sperm and egg production in humans?

Which of these international trade concepts results in specialization and trade increases in total world output? a) absolute advantage b) balance of payments c) absolute advantage d) international tariffs

What is it called when someone gets sick from eating food contaminated with germs or toxins? a. potentially hazardous food b. ptomaine poisoning c. foodborne illness d. raw food

Balanced rock sits on a thin spike of rock in a canyon what forces keep the rock balanced on its tiny pedestal