The Role of Petals in Flower Pollination
Petals are more than just colorful decorations in a flower. They serve an important purpose in attracting insects to the flower for pollination. Petals may have specific guidelines on them,
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About The Role of Petals in Flower Pollination
PowerPoint presentation about 'The Role of Petals in Flower Pollination'. This presentation describes the topic on Petals are more than just colorful decorations in a flower. They serve an important purpose in attracting insects to the flower for pollination. Petals may have specific guidelines on them,. The key topics included in this slideshow are . Download this presentation absolutely free.
Slide3Pe t a l - P e t a l s a r e u s e d t o a t t r a c t i n s e c t s i n t o t h e f l o w e r , t h e y m a y h a v e g u i d e l i n e s o n t h e m a n d b e s c e n t e d . S t i g m a - I s c o v e r e d i n a s t i c k y s u b s t a n c e t h a t t h e p o l l e n g r a i n s w i l l a d h e r e ( s t i c k ) t o . S t y l e - T h e s t y l e r a i s e s t h e s t i g m a a w a y f r o m t h e O v a r y t o d e c r e a s e t h e l i k e l i h o o d o f p o l l e n c o n t a m i n a t i o n . I t v a r i e s i n l e n g t h .
Slide4Ovary-This protects the ovule and once fertilization has taken place it will become the fruit. Ovule- The Ovule is like the egg in animals and once fertilization has taken place will become the seed. Flower stalk- Gives support to the flower and elevates the flower for the insects. Sepal- Sepals protect the flower while the flower is developing from a bud .
Slide5Filament-This is the stalk of the Anther. Anther- • The Anthers contain pollen sacs. • The sacs release pollen on to the outside of the anthers that brush against insects on entering the flowers. • Once the pollen is deposited on the insect..it is transferred to the stigma of another flower. • The ovule is then able to be fertilized.
Slide6Male PartsStamen Female Parts Pistil Anther Filament Ovary Stigma Ovule Style
Slide72 Types of flowers: Perfect vs. ImperfectImperfect- a flower that has either all male parts or all female parts Perfect- a flower that has both male and female parts in the same flower EX: cucumbers, pumpkin, and melons EX: roses, lilies, and dandelions
Slide8Complete vs. Incomplete Flowers• Complete Flowers • Has all 4 main parts • Sepal, petal, pistil, and stamen • Ex.- • Incomplete Flowers • One or more of the 4 main parts of flower is missing • Ex. -windflower
Slide10Angiosperm Life cycle• Pollination -transfer of pollen from the stamen to the pistil. • Pollen -yellow powder that contains sperm cells. • Pollinators transfer pollen’ • Ex.-bees, birds, and other animals
Slide11How are pollinators attracted to aflower? • Nectar –sweet liquid produced by flowers to attract pollinators. • Flowers -colorful petals, interesting shapes, and scent that appeal to pollinators • Pollination can also occur with the help of the wind. Ex-grasses and some trees
Slide12Seeds• Seeds have 3 main parts • Embryo -offspring that can grow into a new plant • Cotyledon -food supply for the embryo • Seed coat- tough outer covering Germination -development of a new seed into a plant
Slide13Seed Dispersal• Float and carried by the wind • Float and be carried by water (coconuts) • Cling to animal fur or feathers • Seed surrounded by fruit which is eaten by animals then passes through their digestive system