The shape of the eye is largely determined by the

Vitreous

Explanation:

Vitreous is the clear gel that fills the space in the ye and gives it the shape.

The eye is not the perfect sphere, it is made of two parts that are connected. The vitreous is a clear substance that fills in the eyeball. It is made of water. It is like glass.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

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