Name a strait in the southern part of south america.

Sam and ben have discovered some strange animals living in the woods behind their house. ben is excited because he believes they are marsupials, an animal he's never observed in the wild before. his brother is sure it is not. what feature should the boys consider in deciding whether the animals are marsupials?

When employing the core learning system, reading text books and attending class are important ways to knowledge.

Define production possibility curve