What is a bulb?
a. a short section of underground stem encased by overlapping layers of scales
b. a short, thickened underground stem that contains nodes
c. a flattened, photosynthetic stem specialized to store water
d. a fleshy stem that typically grows under the soil and parallel to its surface
e. a stems that branches from a plant’s main stem and grows horizontally on the ground
ANSWER: a
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