Double fertilization is important to the reproductive process because it produces:

A. both the zygote and the endosperm
B. a reaction that keeps the plant from dying
C. a double portion of endosperm
D. nutrition for the seed
E. None of these is true


A. both the zygote and the endosperm

Biology & Microbiology

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A. green algae B. green sulfur bacteria C. green nonsulfur bacteria D. cyanobacteria

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What is the structure labeled B in the accompanying figure?

a. cytoplasm b. nucleoid c. plasma membrane d. capsule e. pilus

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The semifluid matrix that surrounds organelles in a cell is called the:

A. cytoplasm. B. nucleoplasm. C. ribosome. D. stroma.

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All amphibians must return to the water to 

A. feed. B. breathe. C. reproduce. D. All of these answers are true.

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