Some orchids look like female insects. Males pseudocopulate with orchid flowers. Wind pollinates grasses, ragweed, maples, oaks. Pollen on stigma, tube cell grows tube down through style, into an ovule in ovary. 2nd pollen cell divides into 2 sperm cells.
Double fertilization means both sperm fertilize.
One with the egg, Other. Ovary develops into fruit. Top cell is embryo Top cell forms a chain of proembryo cells, then a small ball of globular embryo Tissues start to develop in globular embryo. Plumule is terminal bud above cotyledons. Dormant, food from cotyledons or endosperm.