1. Which of these words means "sort"?     classify     classic     castle

	2. A dichotomous key asks questions that can be answered with     yes or no     up or down     left or right

	3. Is a honeybee a mammal?     yes     no

	4. Is an elephant a vertebrate?     yes     no

	5. Which of these mammals does NOT give birth to live young?     human     bat     platypus

	6. What is the only type of mammal that can fly?     platypus     echidna     bat

	7. Echindas do not give birth to live young. Their young hatch from eggs and are called _______.     puppies     puggles     puddles

	8. One-fifth of all mammals are __________.     humans     dogs     bats

	9. Do any mammals live near you?     yes     no

	10. What word means "footprints"?     tracks     feeding     scat