Define primary pit field, what happens to a primary pit

Define primary pit field

Reference no: EM13158286

a) Define Primary Pit Field
b) what happens to a primary pit field as a meristematic cell differentiates into a sieve cell ( what does it become and how)
c) What happens to a primary pit field as a meristematic cell differentiates into a tracheid? (what does it become and how)

Reference no: EM13158286

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