Which step is not involved in the fertilization of angiosperm flowers?
A. When pollen reaches the stigma of a flower, it begins to grow a pollen tube that pierces the style.
B. Double fertilization produces an embryo and the endosperm.
C. Pollen is transported to a stigma of a flower.
D. The pollen tube grows until it reaches the ovule in the ovary.
E. The style of the pistil contracts to bring the sperm closer to the embryo sac.
Answer: E
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