Pollination between two flowers borne on two different plants of the same species is called:

1. Pollination within one flower or between two flowers of the same plant is self-pollination, ruling out A. 2. Pollination between flowers on two different plants of the same species is cross-pollination. 3. Double fertilization is a later fusion event inside the ovule, not a pollen transfer, so C is ruled out. 4. Vegetative propagation is an asexual method, so D is ruled out. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 3 "Life Processes in Living Organisms Part 2", p.36_