GRE Subject Test: Biology : Understanding Plant Development

Study concepts, example questions & explanations for GRE Subject Test: Biology

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Example Questions

Example Question #1 : Understanding Plant Development

Double fertilization in angiosperms results in a __________ zygote and a triploid __________.

Possible Answers:

diploid . . . seed

haploid . . . endosperm

diploid . . . fruit

diploid . . . endosperm

haploid . . . fruit

Correct answer:

diploid . . . endosperm

Explanation:

Double fertilization is the process by which two sperm cells are introduced to the ovule. One sperm () fertilizes the egg (), creating a zygote(). The other sperm combines with the two polar nuclei (), forming the endosperm () that will nourish the embryo.

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