Which statement 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 while two polar nuclei fuse with a second egg.

Question

06-01-2020
Biology

contestada

Which statement 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 while two polar nuclei fuse with a second egg.

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eyitbay eyitbay · Answer 1 · 2020-01-07T07:21:49+01:00

Answer:b. A sperm nucleus fuses with an egg cell and a sperm nucleus fuses with polar nuclei.

Explanation:

This mode of fertlization occurs only in angioseprms .One of the sperms forms 2n as zygote.

The second sperm fuses with the two polar nuclei to form 3n as endosperm.

The importance of these are:

1. Restoration of diploid condition with the fusion of haploid male and female gametes.

2.it makes plants to recieve stimulus based on which ovary develops into a fruit and shows thst it is ovules that develops into seeds.

albertaebisindou albertaebisindou · Answer 2 · 2020-01-07T18:46:50+01:00

albertaebisindou albertaebisindou

07-01-2020

Answer:

B: A sperm nucleus fuses with an egg cell and a sperm nucleus fuses with polar nuclei.

Explanation:

In double fertilization in angiosperms, one sperm fertilizes the egg to form the 2n zygote, while the other sperm fuses with two polar nuclei to form the 3n endosperm. After fertilization, embryonic development begins

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