photosynthesis

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Across
  1. 3. a green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis. Its molecule contains a magnesium atom held in a porphyrin ring.
  2. 5. a sugar or other substance made by photosynthesis.
Down
  1. 1. synthesize sugars or other substances by means of photosynthesis:
  2. 2. a plastid that contains chlorophyll and in which photosynthesis takes place.
  3. 4. a flattened structure of a higher plant, typically green and blade-like, that is attached to a stem directly or via a stalk.