1. _______ is a non-flowering plant.   Spirogyra   Plum   2. Wolffia ('least duckweed') is the smallest flowering plant.   True   False   3. _______ is a flowering plant.   Guava   Mushroom   4. Mushroom is a _______.   fern   fungus   5. Plum is a _______ flowering plant.   naked-seeded   closed-seeded   6. Bacteria have leaves, stems, and roots.   True   False   7. _______ is a closed-seeded flowering plant.   Oak   Fir   Pine   Spruce   Hint Half-n-half Clue