1. The response of plants to light is known as   Phototropism   Chemotropism   Hydrotropism   Thigmotropism   Hint Half-n-half Clue   2. How is the age of a tree determined?   By measuring its height   By counting the number of its branches   By measuring its girth   By counting the annual rings in a cut trunk   Half-n-half Clue   3. Quinine is obtained from the bark of which tree?   Redwood   Eucalyptus   Cinchona   Bunyan   Half-n-half Clue   4. The feathers of birds are good insulators.   True   False   5. Which of the following animals is not extinct?   Dodo   Brontosorus   Mammoth   Cheetah   Half-n-half Clue   6. Bile is secreted by the   Gall Bladder   Liver   Stomach   Lungs   Half-n-half Clue   7. What forms after the flowers have pollinated?   Leaves   Thorns   New Branches   Fruits   Half-n-half Clue