1. Average seed size of corn seed is 2 to 5 centimetres.
Seeds of corn are dispersed or sown by humans.
2. Hawthorn plant size is 3 to 6 feet and fruit is 1 to 2 cm long.
The seeds are dispersed by birds. They eat the haw fruits and disperse the seeds in their droppings
3. Filed maple seeds are dispersed by wind.
4. Elder or elderberry seeds are dispersed by birds or mammals