| A | B |
|---|
| archegonium | the structure that produces eggs |
| antheridium | the structure that produces sperm |
| sorus | a cluster of sporangia on a fern frond |
| pollen grain | an immature male gametophyte of a seed plant |
| ovule | a female gametophyte of a seed plant |
| pollination | the transfer of pollen grains from the male reproductive structure to the female reproductive structure |
| pollen tube | a tube through which sperm travels from a pollen grain to an ovule |
| seed coat | the hard outer layer of an ovule |
| cotyledon | a seed leaf |
| sepal | the outermost whorl that protects the flower while it is a bud |
| petal | the second whorl that attracts pollinators |
| stamen | the third whorl that produces pollen |
| anther | a pollen producing sac |
| pistil | the fourth and innermost whorl that produce ovules |
| ovary | the swollen lower portion of the female flower parts |
| double fertilization | the process of fusing of 3 haploid cells forms a triploid cell that develops into endosperm |
| vegetative reproduction | asexual reproduction of plants from parts of the plant |
| plant propagation | growing new plants from seed or vegetative parts |
| tissue culture | placing pieces of plant tissue on a sterile medium to grow new plants |
