Learning Objectives •1. Describe the structure of a complete flower.•2. Distinguish between microgametophytes and megagametophytes.•3. Describe the co-evolution between flowers and pollinators.•4. Discuss the advantages and disadvantages of selfing versus outcrossing.•5. Describe the unique features of double fertilization.•6. Describe the development of the ovule into a seed.•7. Describe the development of the ovary into the fruit and features of the pericarp that aid in dispersal.•8. Describe asexual reproduction and provide examples.
Pollination•Self-pollination•Ecologically advantageous•Outcrossing•Separation of male and female structures•Monoecious•Dioecious•Dichogamous•Self incompatibilityRaven 10eFig. 41.25Raven 10e Fig. 41.24Either S allele in the stigma matches S allele in pollen.Either S allele of stigma matches either S allele from parent.
Pollinators and Angiosperms Co-evolution•Bees•Insects other than bees•Birds•Small mammals•WindBirchRaven 10e Fig. 41.22Raven 10e Figure 41.20Hummingbird visiting Heliconia.Bumblebee pollinating Raven 10e Figure 41.18
Angiosperms and double fertilization•Fertilization of egg•Formation of endosperm (3n)Fig. 41.26
Embryo development•Endosperm & embryo•3 dimensional body plan•Suspensor Fig. 41. 27
You've reached the end of your free preview.
Want to read all 17 pages?
- Spring '20
- Pollination, Pollen