NEET2026BiologyChapterActual
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : In angiosperms, endosperm development precedes embryo development. Reason (R) : The primary endosperm cell divides repeatedly to form a haploid endosperm tissue which is filled with reserve food materials for the developing embryo. In the light of the above statements, choose the most appropriate
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
C. (A) is correct but (R) is not correct
Step-by-step solution
In angiosperms, endosperm development precedes embryo development because the cells of the endosperm tissue are filled with reserve food materials and provide nutrition to the developing embryo. Thus, Assertion (A) is correct. The primary endosperm cell (PEC) is formed by the fusion of a haploid male gamete with a diploid secondary nucleus (central cell), a process known as triple fusion. Therefore, the primary endosperm cell and the resulting endosperm tissue are triploid ( 3n ), not haploid. Thus, Reason (R) is i