These structures are connected to the stem by the petiole. For 10 points each:
[10e] Name these plant structures, whose venation can be parallel, pinnate, or palmate. These structures conduct photosynthesis and change colors in the fall.
ANSWER: leaf [or leaves]
[10m] These holes on the underside of a leaf are flanked by a pair of guard cells. Transpiration occurs through these apertures.
ANSWER: stomata [or stoma]
[10h] This hormone triggers the efflux of potassium from guard cells, causing them to collapse and stomata to close. This hormone is opposed by gibberellins as it induces seed dormancy.
ANSWER: ABA [or abscisic acid or abscisin II]
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