Evolution of Land Plants 2 Flashcards
Pine life cycle
look at book
Microgametophyte
the male gametophyte that develops form the microspores of heterosporous plants
pollen grain
mass of microspores in a seed plant appearing usually as a fine dust
megagametophyte
the female gametophyte produced by the megaspore of a plant that produces both microspores and megaspores
integuments
mature female cone
cotyledons
seed leaf within the embryo of a seed
pine embryos
sporophyte plant
Angiosperm life cycle
look at book
pedicel
sepals
pedals
male reproductive parts of an angiosperm
stamen -
anther -
filament -
female reproductive parts of an angiosperm
carpel -
ovary -
stigma -
style -
ovules -
Basic floral anatomy set up
look in photos
seed coat
protective outer layer of a seed
cotyledons
seed leaf within the embryo of a seed. help supply the nutrition to a plant embryo it need to germinate.
epicotyl
the embryonic shoot above he cotyledons, it will develop into the leaves of the plant
hypocotyl
a germinating seedlings stem normally found underneath the seeds leaves but above the root and gradually develops into the stem.
radicle
the first organ to appear when a seed germinates
endosperm
Tissue that surrounds and nourishes the embryo in the seeds of angiosperms
coleoptile
cylindrical organs that ensheath the first leaf and shoot apex in grass seedlings. hey help in the emergence of the first lead and shoot apex, by protecting it during its passage through the soil
Monocot seed
a bisected corn seed with a seed coat, endosperm, embryo, single cotyledon and radicle
Monocot seedling
a 7-day old corn seedling with a coleoptile and adventitious roots
eudicot seedling
7-day old bean seedling with primary and secondary roots, hypotoctyl, cotyledons, and epicotyl, true leaf, apical bud
Describe the pollen dispersal of Gymnosperms
- no spore dispersal
- no flagellated sperm
- yes wind dispersal
What is the dominant generation of gymnosperms
sporophyte dominant
Homospory
The production by various plants (such as the club mosses and horsetails) of asexual spores of only one kind
Heterospory
A situation in which a plant bears two different types of spores. the smaller spore crease the microspore (male gametophyte) and the larger spore is the megaspore (female gametophyte)
Pollination syndrome
Suites of flower traits that have evolved in response to natural selection imposed by different pollen vectors either abiotic or biotic
Sporangia
A structure within which spores are produced
Gametangia
a cell or organ in which gametes are developed
Archegonia
female reproductive organ
Antheridia
Male sex organ, saclike structure made up of a jacket of sterile cells; encloses many cells and when mature, produces one sperm
Mega vs micro prefix
Male MICROspore and Female MEGAspore
Gymnosperms
vascular plants with naked seeds, includes the conifers, cycads, Ginkgo sp., Welwitschia sp., and Gnetum sp.
Angiosperms
vascular plants with seeds in a protective chamber, includes all flowering plants
microsporophylls
a leaf on whoch the microspores are formed in male cones
Microsporangia
a structure in the pants male reproductive organ where the development of the pollen takes place - produces microspores
Megasporophyll
aka ovuliferous scale
megasporangium
a structure in certain spore bearing plants like cones in which megaspores are formed - corresponds to the ovule in seed plants
