Seed
The embryo of a plant encased in a protective shell included with nutrients
Homospory
One type of sporophyll that bears one type of spore
Heterospory
A plant that produces two differing spores, one female one male, from separate organs
Microsporangium/a
Male gametophyte, pollen
Microspore
The reproductive product of microsporangia
Megasporangium/a
Female gametophyte, archegonium
Megaspore
The reproductive product of megasporangia
Sporopollenin
Durable polymer that prevents zygotes from drying
Ovule
Where the female gametophyte is held within the plant ovary
Pollen grain
Structure that holds the male gametophyte, wall is made of sporopollenin
Pollination
Transfer of pollen from one plant to another plant of the same species
Germination
When pollen begins its growth into a pollen tube to discharge the sperm in to the female gametophyte
Gymnosperm
Seed producing phylum of vascular plants, produce "naked" seeds, contain cone bearing plants
Angiosperm
Phylum of seed producing plants, produce "containers" around their seeds, contain flowering plants
Conifer
A cone bearing plant that is typically evergreen
Microsporophyll
Make microspores (male)
Megasporophyll
Make megaspores (female)
Ovulate cone
More complex than pollen cone, bears megasporangia and accepts the pollen for germination
Pollen cone
Simpler structure compared to ovulate cone, consist of scales, releases and produces pollen
Phylum Cycadophyta
Phylum of Gymnosperms, have large cones and palm like leaves
Phylum Ginkgophyta
Phylum of Gymnosperms, have flagellated sperm and deciduous leaves
Phylum Gnetophyta
Phylum of Gymnosperms
Magnoliids
Lower classification of Angiosperms, includes magnolia, laurels and black pepper
Monocots
Lower classification of Angiosperms, includes orchids, grasses, and palms
Phylum Coniferophyta
Phylum of Gymnosperms, largest phyla contains cone bearing plants
Flower
Specialized shoot with up to 4 sets of modified leaves that bears sexual reproduction structures
Sepals
Floral organ that helps to enclose and protect the flower bud before it opens; sterile
Petals
Colorful part of flower that attracts pollinators, sterile
Stamens
Pollen producing organ of flowering plants
Filaments
Stalk portion of the stamen
Anthers
Pollen holding part of the stamen
Carpels
Ovule bearing organ of flowering plants
Stigma
Sticky part of the carpal, captures pollen
Style
Stalk of the carpal
Ovary
Where egg containing ovules develop
Pistil
Term referring to one carpel or multiple carpels fused together
Fruit
mature ovary of a flowers, aids in protection and dispersal
Pericarp
Part of the fruit formed from the wall of the ovary
Embryo sac
Female gametophyte of angiosperms, contains 8 haploid nuclei
Cross-pollination
Transfer of pollen from the anther of one flower to the stigma of another
Micropyle
Pore in the integuments of an ovule
Double fertilization
2 sperm cell unite with 2 cells in the female gametophyte to form zygote and endosperm
Endosperm
Nutrient rich tissue that provides nourishment to embryo in angiosperm embryo
Cotyledons
Embryonic leaf, first leaf of a plant
Monocot
1 cotyledon
Dicot
2 cotyledons
Eudicot
Lower classification of Angiosperms, largest group, contain edible groups and ornamental flowers
Basal angiosperms
Earliest flowering plants, water lilies
Magnoliids
Lower classification of Angiosperms, includes magnolia, laurels and black pepper
Eudicots
Lower classification of Angiosperms, largest group, contain edible groups and ornamental flowers
What are the variations in seed dispersal
Wind, water, animal fur, and defication
Gametophyte/sporophyte relationships across all plants?
Vascular plants are sporophyte dominated while nonvascular are gametophyte dominated
What are some terrestrial adaptations that have allowed seed plants to generate diversity?
Contain a supply of nutrients, multicellular embryos, and a protective coating
Why are these adaptations necessary for seed plants?
Supply of nutrients allows new plants to get a head start, multicellular embryos allow for a better start, and protective coating allows it to be dispersed without water
Life cycle of a gymnosperm
Pollen leaves the pollen cone and enters the ovulate cone of another organism. The pollen forms a pollen tube and fertilizes the egg. The zygote forms a seed which is dispersed and grows into a sporophyte through mitosis. A new organism is grown and the gametes are produced through meiosis
Life cycle of an angiosperm
A vehicle of pollination (pollinator, wind, etc.) gathers pollen off of the anther of one plant and transfers it to the stigma of another. There the sperm is released into the pistil of the plant (contains ovules). A seed is formed through mitosis and a new sporophyte plant grows form the seed. Gametes are produced through meiosis and the process is repeated