Question

Which of the following pairs in angiosperms are diploid and triploid, respectively?

• A. Polar nucleus and secondary nucleus
• B. Microspore mother cell and egg cell
• C. Secondary nucleus and endosperm
• D. Endosperm and antipodal cells

Answer 1

Answer: (C)

The secondary nucleus and endosperm are the part of the developing seeds of angiosperm. Two polar bodies fuse to form secondary nucleus $(2n)$. This structure when fuses with a male nuclei forms triploid structure $(3-n)$ called primary endosperm nucleus which on division forms the endosperm $(3n)$. This provides nutrition to the developing seed.