Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

[Q]: Sexual reproduction involves the union of cells from ____ parents.
[A]: two


[Q]: Macular degeneration comes in ____ forms, dry and wet.
[A]: two


[Q]: Light emanates ____ major rays that have varying wavelengths.
[A]:
seven