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Susan Martin 7th grade Science

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1 Susan Martin 7th grade Science
Pollination Methods Susan Martin 7th grade Science

2 To my darlings…. You will just look at these pictures and see some of the things we have been talking about. If you act CRA-CRA Mrs. Cami will make you write all the slides! ACasey

3 Pollination Transfer of pollen grains (male-sperm) to the female part (stigma) of a seed plant by agents such as gravity, water, wind, and animals

4 Some flowers are JUST male OR female
The Alder is monoecious. Shown here: maturing male flower catkins on right, last year's female catkins on left (top right) male flower enlarged, showing stamens with pollen and reduced, sterile stigma; (below) shoot with flowers from female plant; (lower right) female flower enlarged, showing stigma and reduced, sterile stamens with no pollen

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6 Function of a Flower To attract pollinators by colorful petals, scent, nectar, markings and pollen

7 Pollination Methods- 1. Wind/Gravity
angiosperms& gymnosperms No bright colors, special odors, or nectar Most have no petals so Stamens and stigmas exposed to air Large amount of pollen lightweight, easily airborne Usually trees & grasses

8 2. water Pollen floats on the water’s surface drifting until it contacts flowers Very rare, waterweeds and pondweeds

9 3. Animals A. Insects Bee- usually yellows or blues, have nectar and/or pollen Butterfly: usually pinks or purples, scented, may have landing area, lots of nectar with little pollen, nectar guides & long tubes for butterfly tongues

10 Animals cont. Insects continued
Moths: usually white, blooms at night, strong sweet scents Beetles: may be spicy, fruity, or smell like decay Fly: Can have nectar or pollen, or smell like decay

11 Animals cont. B. Birds- greatest nectar specialization, odorless, red or orange flowers, long tubes for hummingbirds C. Bats: large, white, strong odor, open at night, offer nectar

12 Resources


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