Lignin
a. is needed directly for photosynthesis.
b. is a red pigment.
c. provides structural support and waterproofing to plants.
d. is the female reproductive cell in seed plants

cats appear to have glowing cat eyes because the back of their eyeballs includes a special reflective surface called the tapetum lucidum. this lets them see better during the night, giving them a much better vision.

one centimetre is equal to 0.01 metres

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