1. In most songbirds, which sex does the singing? Answer: (M, F or B?)

2. What sex is the largest animal in the world? Answer: (M, F or B?)

3. In almost all South American parrots, which sex is brightly colored? Answer: (M, F or B?)

4. In reindeer, which sex grows antlers? Answer: (M, F or B?)

5. Which sex of goat has a bad smell? Answer: (M, F or B?)

6. In South American marmosets (a type of primate), which sex takes the greatest responsibility in caring for the young? Answer: (M, F or B?)

7. In bears, which sex cares for the offspring? Answer: (M, F or B?)

8. Which sex of vampire bat drinks blood? Answer: (M, F or B?)

9. In rhinoceroses, which sex has horns? Answer: (M, F or B?)

10. In elephants, which sex leads the herd? Answer: (M, F or B?)

11. In eagles, which sex cares for the young? Answer: (M, F or B?)

12. In crickets, which sex sings? Answer: (M, F or B?)

13. What sex are most dogs that bite people? Answer: (M, F or B?)

14. Which sex of mallard duck rears the young? Answer: (M, F or B?)

15. What sex are all worker ants and bees? Answer: (M, F or B?)