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Biology: Life On Earth Ch. 21
Vocab for Ch. 21: The Diversity of Plants
20
Business
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12/13/2005

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Term
alternation of generations
Definition
The process in which seperate diploid and haploid generations alternate with ne another.
Term
angiosperm
Definition
Modern flowering plants
Term
antheridia
Definition
The bryophyte structure in which sperm are formed.
Term
archegonium
Definition
The bryophyte reproductive structure in which eggs develop.
Term
bryophyte
Definition
Nonvascular plants
Term
conifer
Definition
The plant group which retains green leaves year-round, has a water-proof covering on leaves, and have an "antifreeze" sap.
Term
cuticle
Definition
A waxy substance which covers leaves and stems to limit the evaporation of water.
Term
flowers
Definition
the structures in which both male and female gametophytes are formed.
Term
fruit
Definition
The matured ovary surrounding the seed of an angiosperm
Term
gametophyte
Definition
Multicellular, haploid plants.
Term
gymnosperm
Definition
Nonflowering seed plants
Term
lignin
Definition
the stiffening substance which supports plant bodies, helping plants expose maximum suface area to sunlight.
Term
ovules
Definition
Immature seeds.
Term
pollen
Definition
Tiny structures that carry sperm-producing cells.
Term
seed
Definition
An embryonic plant contained with a supply of food and a protective outer coat.
Term
sporophyte
Definition
The generatino in thwich the plant body consists of diploid cells.
Term
stomata
Definition
Pores in leaves and stems which open to allow gas exchange but close when water is scarce.
Term
vascular
Definition
Plants with supportive, nutrient-conducting vessels.
Term
Vessel
Definition
Conducting cells which serve purpose as support as a form of transportation for nutrients.
Term
zygotes
Definition
cells which develop into diploid sporophytes.
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