1. The hard wood in the center of a tree trunk is referred to as 'heartwood'.   True   False   2. During _______, the pollen grains are transferred from the anthers of a flower to the stigma of the same flower.   self-pollination   cross-pollination   3. Which of the following plants has a rhizome?   Solomon's Seal   Potato   Tulip   Crocus   Daffodil   Hint Half-n-half Clue   4. What is a seed called before it undergoes fertilization?   Embryo   Ovary   Ovule   Half-n-half Clue   5. Which of the following is dispersed by wind?   Clematis   Water Lily   Balsam   Oxalis   Castor   Half-n-half Clue   6. The growth of a pollen tube enables pollination to take place.   True   False   7. Which of the following is not dispersed by wind?   Coconut   Cinchona   Orchids   Oroxylon   Drumstick   Half-n-half Clue