1. How is the age of a tree determined?   By counting the annual rings in a cut trunk   By counting the number of its branches   By measuring its girth   By measuring its height   Hint Half-n-half Clue   2. Quinine is obtained from the bark of which tree?   Redwood   Eucalyptus   Bunyan   Cinchona   Half-n-half Clue   3. Farmers can keep their soil fertile by   Crop Rotation   Regular Tilling   Repeatedly growing the same crop   Irrigation   Half-n-half Clue   4. The feathers of birds are good insulators.   True   False   5. What is quinine used for?   Curing Malaria   Curing Aids   Curing Typhoid   Removing pimples   Half-n-half Clue   6. Which of the following is a parasite?   Wolves   Pigs   Zebra   Ringworm   Half-n-half Clue   7. Which of the following are known as "aves"?   Birds   Reptiles   Fish   Mammals   Half-n-half Clue