Correct answer - Tetrahedral, planar or flat.
Why? - When carbon forms single bonds with other atoms, the shape is tetrahedral. When two carbon atoms form a double bond, the shape is planar, or flat. Single bonds, like those found in ethane, are able to rotate.
Atoms are the smallest unit of non-living things and CELLS are the smallest unit of living things.
Answer:
I think it is sugar, as it is using sugar to grow.