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reproductive structure that produces eggs in seedless plants


reproductive structure that produces sperm in seedless plants


cluster of sporangia on a fern frond

pollen grain

structure consisting of a few haploid cells surrounded by a thick protective wall that contains a male gametophyte of a seed plant


structure of a seed plant sporophyte in which a female spore forms and then develops into a female gametophyte that contains an egg; structure in the ovary of a pistil that develops into a seed


transportation of pollen grains from a male reproductive structure of a flower to a female reproductive structure of a flower

polllen tube

structure that grows from a pollen grain to an ovule, enabling a sperm to pass directly to an egg

seed coat

the protective, outer covering of a seed


leaflike structure of a plant embryo; functions in the transfer of stored nutrients to the embryo, in which food is stored


structure of a flower that encloses and protects a flower bud


structure of a flower that is often colorful and may attract pollinators to the flower


male reproductive part of a flower


sac at the tip of a stamen in which pollen grains form


female reproductive part of a flower; consisting of an ovary, style, and stigma


reproductive structure that produces eggs; in flowering plants, that lower part of a pistil that produces eggs in ovules; in animals, the gamete-producing organ of the female reproductive system

double fertilization

process by which two sperm fuse with cells of the female gametophyte, producing both a diploid (2n) zygote and a triploid (3n) endosperm

vegetative reproduction

type of reproduction in which new plants grow from vegetative parts such as roots, stems, and leaves

plant propagation

practice of growing plants from seeds or vegetative parts

tissue culture

technique for growing pieces of living tissue in artificial media

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