Presentation on theme: "Angiosperms – vessel seed"— Presentation transcript:
1 Angiosperms – vessel seed •Seed plants that produce flowers• Seeds are enclosed in fruits• Live almost anywhere on earth, even theArctic and deserts
2 Flowers Their function --- reproduction. Structure – (note - some may have only male parts, somelack petals.) p.277
3 Sepals – leaflike structures that enclose the bud.- protect the developing flower.
4 Petals – usually the most colorful part. - pollinators are attracted to brightness,patterns – males may see patternssimilar to those exhibited by females.
5 Stamens – male reproductive parts Stamens – male reproductive parts. filament – thin stalk positions anther/pollen for contacting pollinators. anther – produces pollen at top of filament. - pollen contains sperm cells.
6 Pistils – female reproductive parts Pistils – female reproductive parts. - found in the center of most flowers. - flowers have one pistil. stigma – sticky tip of the pistil that pollen sticks to. style – slender tube connecting stigma to hollow ovary. ovary – protects seeds as they develop. - contains one or more ovules, which contain the eggs.
11 Reproduction in Angiosperms pollination – occurs when a grain of pollen fallson a stigma.- some occurs by wind.- most rely on pollinatorsnectar – sugar-rich food deep inside flower.- pollinator enters flowerfor nectar, brushesagainst pollen.- pollen is carried to stigmaof same flower oranother one.
13 Fertilization - sperm cell from pollen moves down pollen tube. - sperm joins with an egg cell inside an ovule withinthe ovary.- zygote begins developing into the seed’s embryo.- other parts of the ovule become the rest of theseed.