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21 Cards in this Set
- Front
- Back
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Interspecific variation |
Between species variation |
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Intraspecific variation |
Variation occurring within the same species |
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The two main causes of Variation |
Genetics & Environment |
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Genetic causes of variation |
Mutation, Crossing over, & Genetic recombination |
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Environmental causes of variation |
Acclimation & Adaptation |
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Phenotypic plasticity |
Alteration in plant form in response to environmental factors (ex: Sun vs shade leaves) |
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Heterophylly |
The occurrence of two or more leaf shapes on one tree |
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Developmental plasticity |
Tree morphology can vary based on the age of the tree |
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Abnormal (mutational) variation |
Mutations are the source of this |
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Chromosomal variation |
Variation in chromosome number, can also change via polyploidy |
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Neutral variation |
Non-adaptive variation, this is not operated non by selection |
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Ecotypic variation |
Distinct ecologicalrace or form that exists because of adaptation todistinct environmental conditions
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Clinal variation |
A continuous gradient in someimportant environmental factor: temperature,moisture availability, photoperiod, saltconcentration in the soil, etc…
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Reproductive variation |
Variation in breeding system or plant sexuality |
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Apomixis |
Reproduction via rootsprouts, layering, fragmentation
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Angiosperms |
Division Magnoliophyta, flowering plants |
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Eight |
There are ___ Angiosperm clades |
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Derived characteristics of angiosperms |
Flowers, seeds, ovules enclosed in an ovary, double fertilization |
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Alternation of generations |
Plants alternate between a multicellularhaploid (gametophyte) stage and amulticellular diploid (sporophyte) one
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Gametophyte stage |
This stage is reduced in most angiosperms |
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