1. Cycas is a _______ plant.   naked-seeded   closed-seeded   2. Australian Cedar tree is the tallest flowering plant.   True   False   3. _______ is a flowering plant.   Guava   Mushroom   4. Mango is a _______ plant.   non-flowering   flowering   5. Mushroom is a _______ plant.   non-flowering   flowering   6. _______ is a non-flowering plant.   Spirogyra   Plum   7. Wolffia ('least duckweed') is the smallest flowering plant.   True   False