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Plants
Plants
28
Biology
Undergraduate 2
10/10/2012

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Term
Key features of plants
Definition
Multicellular, photosynthetic, unique reproductive cycle
Term
Unique reproductive cycle
Definition
alternation of generations between sporophyte and gametophyte
Term
sporophyte
Definition
diploid, produces haploid spores, meiosis
Term
gametophyte
Definition
haploid, produces haploid gametes, mitosis
Term
Similarities between Green algae and plants
Definition
DNA, types of chlorophyll and accessory pigments, store food as starch, cell walls made of cellulose
Term
Plant adaptations to dry land
Definition
Roots,l waxy cuticle, stomata, conducting vessels, lignin, seeds
Term
lignin
Definition
stiffening agent
Term
waxy cuticle
Definition
prevents water loss
Term
Bryophytes
Definition
live in moist environment, structurally simple plants with no vascular tissue (Examples: Liverworts and moss)
Term
Rhizoids
Definition
rootlike structure of bryophytes
Term
Archagonium
Definition
where eggs develop in bryophyte, egg has chemical that attracts sperm
Term
Antheridium
Definition
sperm formed here, prevents gametes from drying out
Term
Seedless vascular plants
Definition
have conducting vessels that also provide support (Examples: ground pines, horsetails, ferns)
Term
Only seedless vascular plant with broad leaves
Definition
ferns
Term
Seed plant adaptations
Definition
Pollen and seeds
Term
Pollen
Definition
male gametophyte, allows fertilization to occur without gametes traveling through water
Term
Seeds
Definition
allow embroys to develop without being immersed in water. contains embryo, food supply, protective coat
Term
Seed coat
Definition
keeps baby plant cozy and dormant until it can grow
Term
Gymnosperm
Definition
"one leaf" , lacks flowers (example: conifers, ginkos)
Term
Angiosperm
Definition
"Two leaves" (Example: Dandelion seed, coconut, bean)
Term
Ginko
Definition
gymnosperm, herbal remedy, pollution-resistant
Term
Cycad
Definition
gymnosperm, can be thousands of years old, grow slowly, derived from ferns
Term
Conifer adaptations to cold conditions
Definition
retain green leaves, leaves are waterproofed thin needles, "antifreeze" in sap (causes scent). Slow fertilization
Term
Adaptation of angiosperms
Definition
flowers, fruits, broad leaves
Term
Flowers
Definition
where gametes are kept, showy flowers attract insects and further the species, don't need to make too much pollen
Term
Fruit
Definition
seeed dispersal. entices animal to eat fruit that holds seeds
Also includes burrs, which latch on for transportation
Term
Broad leaves
Definition
aid in collecting sunlight for photosynthesis, but may lead to water loss
Term
Defenses against herbivores
Definition
Thorns, spines, resins, chemical defenses
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