Midterm 2 Flashcards
what are the major groups of vascular plants?
ferns, gymnosperms and angiosperms
______ has spores
ferns
gymnosperms have _____ ovules
naked
what are some general characteristics of gymnosperms?
woody plants, leaves are fan like, scale like or needle like, flowers unisexual with no perianth, arranged in cones,
do gymnosperms have fruit?
no
name the seed plants of gymnosperms (4)
- cycadales
- Ginkgoales
- Coniferales
- Gnetales
gymnosperms and angiosperms are ______ plants
seed
describe cycadales, cycadacea
diocious
genus: Cycas; Cicircinalis
describe the Gynko; Ginkgoaceae
G.biloba
- fan like leaves, dioecious, seeds bad smelling outer coat, and hard inner coat, trees have no resin canals
maidenhair tree
Ginko biloba
the ginkgo tree is the only relative of the order ginkgoes? (t/f)
t
why is the ginkgo a scared tree?
symbol of unity of opposites, eternity and longevity, bearer of hope, symbol of love, protector against fire, because of all its properties associated with longevity
name medicinal uses of the gingko tree?
- improves blood flow
- protects against oxidative cell damage from free radicals (antioxidant)
- blocks effects of PAE (blood clotting)
- all have been involved in the development of cardiovascular, renal and respiratory and CNS disorders
The gingko tree is also ornamental in urban areas, why?
resistant to pollution, leaves turn yellow in falll
the coniferales include?
- pinaceae
- cupressaceae
- taxaceae
Taxaceae
Yews
describe taxaceae
yews, no resin canals, needle like persistent leaves, small cones (m), naked ovules (f), plant is toxic besides the fleshy red part of seeds which are dispersed by birds
taxus canadensis
canada yew, shrub in swampy forests, browsed by deer
the pacific yew: taxis brevifolia are the sources of what drug against cancer?
taxol
the harvesting of taxol has lead the pacific yew to become an ________ species
endangered
the Canada yew contains ________
paclitaxel
describe cupressaceae
- shrubs and trees with resin glands
- leaves variable, opposite or needle like
- monoecious or dioecious
- male flowers in small cones and female cones with few flowers
describe thuja
sometimes shrubs when young, leaves scale like and opposite, monoecious, female cones have a few pairs of opposite scales
________ is widely use for the treatment of the common cold and its efficacy as an adjuvant to standard antibiotic treatmentt to severe bacterial infections
thuja