3. The number of pyrenoids in a cell of Spirogyra is A.1 B.2 C.3-5 D.Numerous
Answer: Option D Solution: The biological parameters, which included cell width, cell length, number of chloroplast spirals, and number of pyrenoids, ranged from 40 to 90 μm, 85 to 263 μm, 5.5 to 16 spiral, and 50 to 240 pyrenoids, respectively.
