NEETBotanySexual Reproduction in Flowering Plants
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The fertilization process in angiosperms is uniquely termed as double fertilization. Reason (R): Two male gametes are released by the pollen tube, where one fuses with the egg cell and the other fuses with the two polar nuclei. In the light of the above statements, choose the correct answer from th
Options
- ABoth (A) and (R) are true but (R) is not the correct explanation of (A).
- BBoth (A) and (R) are true and (R) is the correct explanation of (A).
- C(A) is true but (R) is false.
- D(A) is false but (R) is true.
Correct answer
B. Both (A) and (R) are true and (R) is the correct explanation of (A).
Step-by-step solution
Assertion (A) is true because the phenomenon of two types of fusions taking place in the embryo sac is a unique characteristic of flowering plants (angiosperms), which is termed double fertilization. Reason (R) is true and provides the exact mechanism for this phenomenon. The pollen tube releases two male gametes into the synergid. One male gamete fuses with the egg cell (syngamy) to form a diploid zygote. The other male gamete fuses with the two polar nuclei (triple fusion) to form the triploid primary endosperm n