Download presentation
Presentation is loading. Please wait.
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
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
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.