Chapter 30 Flashcards
Ecosystem
consists of all organisms in a particular area, along with physical components of the environment such as the atmosphere precipitation, surface water, sunlight, soil and nutrients
Ecosystem Services
enhance the life supporting attributes of the atmosphere, surface water, soil, and other physical components of an ecosystem
Artificial Selection
selecting individuals with the largest and most nutritious seeds, leaves, or other plant parts year after year
Non Vascular Plants
specialized group of cells that conduct water and nutrients from one part of the plant body to another
Example: Moss / Byrophytes
Seedless Vascular Plants
have vascular tissue, but do not have a seed
Example: Fern
Seed Vascular Plants
consists of an embryo and a store of nutritive tissue, surrounded by a tough protective layer
Example: Angiosperm / Gymnosperm
Angiosperms
encased seed
Sporopollenin
- water tight material that covers fossilized spores
- encases spores and pollen from modern land plants and help them resist dying
Sporangia (Plural: Sporangium)
spore producing structures
Gymnosperms
Naked seeds
Stoma (Plural: Stomata)
a “mouth” that allows plants to take in CO2
-present in all land plants except the liverworts, which have spores but no guards
Guard cells
controls if the stomata tells the pore to be opened or closed
Pore
“the opening”
- opens or closes as the guard cells change shape
- Control water loss
Lignin
Complex polymer built from six-carbon rings. It is extraordinarily strong for its weight and is particularly effective in resisting compressing forces such as gravity
Tracheids
long, thin, tapering cells that have a thickened, lignin-containing secondary cell wall in addition to a cellulose based primary wall; and pits in the sides and ends of the cell where the secondary cell wall is absent, where the water can flow efficiently from one tracheid to the next
