Question

Assertion (A)
:
Double fertilisation is characteristic feature of angiosperms.
Reason (R)
Double fertilisation involves two fusions.​

Answer 1

Answer:

Double fertilization is the characteristic feature of angiosperms This phenomenon first observed by Nawaschin, 1898 in Lilium and Fritillaria. In angiosperms one male gamete fuses with the two polar nuclei to form triploid primary endosperm ^ nucleus. ... These two acts together are known as double fertilization.

Explanation:

yes

Answer 2

Here, both Assertion and Reason are correct, but Reason is not the correct justification for Assertion.

• Because Double fertilization is a distinct aspect of angiosperms. It implicates two fusions in which one female gamete fuse with the egg cell to construct a zygote and another male gamete fuses with the diploid secondary nucleus to generate a triploid primary endosperm nucleus.
• In the double fertilization procedure, one of the two pollen nuclei fuses with the egg and another with polar nuclei. Therefore, there are two varieties of fusion, one is fertilization and another is triple fusion. Thus, fertilization in an angiosperm is named double fertilization.