Answer: Ants (myrmecochory -- ants carry seeds to their nests, dispersing them).
- A Birds, which swallow the seeds whole and disperse them in droppings
- B Ants (myrmecochory -- ants carry seeds to their nests, dispersing them)
- C Wind currents that carry the lightweight seed structures
- D Water currents that float the seeds downstream
Correct answer: B. Ants (myrmecochory -- ants carry seeds to their nests, dispersing them)
Explanation: Elaiosomes: lipid-rich seed appendages. Ants collect seeds for elaiosomes (food reward), carry them to nests, eat the elaiosome, and discard the viable seed -- dispersal by ants (myrmecochory).
Double fertilisation in angiosperms: one male gamete fuses with the egg to form the diploid zygote (syngamy), while the second fuses with the two polar nuclei to form the triploid primary endosperm nucleus (triple fusion). Image: Triploid, CC BY 3.0, via Wikimedia Commons.
Concept context
Flower structure, pollination, double fertilization, and seed/fruit development - the highest-scoring Class 12 biology chapter in NEET.
Read the full Sexual Reproduction in Flowering Plants notes →