| A | B |
|---|
| anther (25-2) | a pollen-producing sac |
| antheridium (25-1) | a structure that produces sperm |
| archegonium (25-1) | a structure that produces eggs |
| cotyledon (25-1) | leaflike structure of a plant embryo that transfers stored nutrients to the embryo |
| double fertilization (25-2) | two sperm fusing with cells of the female gametophyte to produce both a zygote and an endosperm |
| ovary (25-2) | a pistil's swolen lower portion that contains ovules |
| ovule (25-2) | the part of the sporophyte in which the female gametophyte develops |
| petal (25-2) | one of the flower parts that attract pollinators |
| pistil (25-2) | a flower structure that produces ovules |
| plant progagation (25-3) | growing new plants from seeds or from vegetative parts |
| pollen grain (25-2) | structure that contains a male gametophyte of a seed plant |
| pollen tube (25-2) | grows from a pollen grain to an ovule |
| pollination (25-2) | the transfer of pollen grains from the male to the female reproductive structure |
| seed coat (25-2) | protects the embryo of a seed from mechanical injury |
| sepal (25-2) | one of the flower parts that protects a flower from damage when it is a bud |
| sorus (25-1) | a cluster of sporangia on a fern frond |
| stamen (25-2) | a flower structure that consists of a threadlike filament topped with an anther |
| tissue culture (25-3) | a technique used to grow plants from pieces of plant tissue |
| vegetative reproduction (25-3) | the type of reproduction by which plants produce offspring from vegetative parts |
