General Terms - angiosperms Flashcards
Pollination syndromes
Suites of characteristics of particular group of flowering plants that represent evidence of coevolution
More efficient and less waste than wind
Coevolution
Evolutionary response in both directions so one change leads to the other
Unisexual flowers
Only produce either pollen or ovules on separate flowers
Bisexual flowers
Produce both pollen and ovules on same flower
Monoecious plant
Individual plant gas 2 types of flowers
- Flowers with stamens but no functional carpels
- Flowers with one or more carpels but no functional stamens
Dioecious plant
Individual plant only has one type of flower
- Flowers with stamens but no functional carpels
- Flowers with one or more carpel but no functional stamen
Incapable of selfing
Imperfect flowers
Have either stamens or carpels but not both
Spatial separation
Different heights of anthers and stigmas on the same flower
Self-incompatability
Genetic system that allows plants to recognize pollen that shares the one or both alleles of S gene and preventing those male gametophytes from reaching ovules
Selfing
Forming seed from fertilization involving sperm and egg form the same individual
Evolutionary changes in floral structure
- Reduction in number of parts or whole sets of flower
- Fusion of parts
- Bilateral symmetry
- Container that protects ovules
Carpels
Contains immature seeds (ovules)
Includes stigma, style, ovary, and pistil
Fertile
Stigma
Sticky surface where pollen is received and germinates
At the top
Style
Pollen tubes grow down through to reach ovules
Between stigma and ovary
Ovary
Chamber containing ovules
Bottom of carpel