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20. What reproductive structure do gymnosperms produce? A. cones B. flower C. fruit D. spores 21. How are seeds with feathery structures scattered? A. by wind C. by insects B. by water D by sticking to clothing 22. Why are birds and insects important to plants? A. they help in pollination B. they help the plants grow C. they give nectar to the plants D. they protect the plants from their enemies 23. Which of the following groups of animals is NOT classified? A. birds- pigeon-crow-maya B. mammals-whale- platypus-dog, man C. reptiles-snake- turtle-crocodile, dinosaur D. amphibians-salamander, frog, alligator, tuatara 24. What animals lay eggs in water but usually live on land? A. amphibians C. reptiles D. mammals B. fishes 25. Which of the following best describes reptiles? A. they live on land only B. they lay eggs without shells C. They are water dwellers all their lives D. they have scales and lay eggs with shells
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