Asked by Denise Uruchima on May 01, 2024
Verified
Which statement best describes double fertilization in an angiosperm?
A) Two egg cells are fertilized within each ovule.
B) A sperm nucleus fuses with an egg cell and a sperm nucleus fuses with polar nuclei.
C) Two sperm are required for fertilization of one egg cell.
D) A flower can engage in both self-pollination and cross-pollination.
E) One sperm fertilizes the egg which divides twice to form two embryos.
Double Fertilization
In flowering plants, one sperm nucleus unites with the egg nucleus, and a second sperm nucleus unites with the polar nuclei of an embryo sac.
Polar Nuclei
Cells found within the ovule of flowering plants that fuse with one sperm cell to form the endosperm, providing nutrition to the developing embryo.
Angiosperm
Flowering land plant; the seeds are borne within a fruit.
- Outline the structures associated with the reproductive processes in angiosperms, considering the creation of pollen grains and the instance of double fertilization.
Verified Answer
JC
Jasmine ChathaMay 04, 2024
Final Answer :
B
Explanation :
Double fertilization in angiosperms involves two sperm cells. One sperm cell fertilizes an egg cell to form a zygote, while the other sperm cell fuses with two polar nuclei to form a triploid endosperm. This process results in the formation of both the embryo and the nutritious endosperm inside the seed.
Learning Objectives
- Outline the structures associated with the reproductive processes in angiosperms, considering the creation of pollen grains and the instance of double fertilization.