BSC2011 EXM 3 VOCAB

Angiosperms: The “seed in a vessel” plants. They produce flowers. Everything that is not a pine, cypress,
spruce, etc.
Antheridium: Male reproductive structure; produces haploid sperm
Archegonium: Female reproductive organ; produces haploid eggs
Gametophyte: The multicellular haploid phase that produces gametes.
Gymnosperms: The “naked seed” plants. They do not produce flowers. Pines, Cypress, Spruces, etc.
Heterosporous: A plant that produces two types of spores: megaspores which develop into female
gametophytes and microspores that develop into male gametophytes.
Homosporous: A plant that produces only one type of spore that develops into a gametophyte with both
male and female reproductive organs.
Megasporangium: Sporangium (2n) that produces megaspores
Megasporocyte: The diploid cells within the megasporangium that produce the haploid female
gametophyte via meiosis
Megaspore: A haploid spore that produces the female gametophyte
Microsporangium: Sporangium (2n) that produces microspores
Microsporocyte: The diploid cells within the microsporangium that produce the haploid male
gametophyte via meiosis
Microspore: A haploid spore that produces the male gametophyte
Monoecious: “One house.” Both male and female reproductive organs on same plant.
Dioecious: “Two houses.” Male reproductive organs on one plant and female reproductive organs on
separate plant. Each plant is either male or female.
Bryophytes: Phylum of nonvascular plants, Liverworts Mosses and Hornworts
Pollen cone: Gymnosperm male cones. Microsporangia are located on pollen cones
Ovulate cone: Gymnosperm female cones. Megasporangia are located on the ovulate cones
Rhizoid: In non-vascular seedless plants, hair-like extensions that anchor the plants to the ground
Sori: A cluster of sporangia on the underneath of some seedless vascular plants
Sporangium: In seedless plants, a multicellular organ where meiosis occurs and haploid cells develop
Spore: A haploid cell that divides by mitosis to develop into the haploid adult
Sporophyll: Found on Gymnosperms, woody leaves that contain the sporangia
Sporophyte: The multicellular diploid phase that produces spores
Strobilus: A cone-like structure composed of sporophylls
Thallus: A simple, vegetative body which is not differentiated into true leaf, stem, or root.
Tracheids: Dominant xylem cell in Gymnosperms. Lignified cells that transport water throughout the
plant.