I made this slideshow for my honors 7th grade Life Science class. It's a work in progress. It's heavy on angiosperms, but needs more information about gymnosperms and seedless plants. 7th grade, anther, biology, cones, egg, fertilization, gymnosperm, life science, ovules, pistil, plant reproduction - angiosperms, pollen dispersal, pollen grain, pollen tube, pollination, science, stamen, stigma, style

1. Plant Reproduction
• All students: copy the white text.
• Honors students: ALSO copy the bold yellow text
• The italicized green text is FYI – read it – copy it if
you’d like.

2. MANY KINDS OF PLANTS...

3. Yes, copy this diagram – label it too!

4. Angiosperms (flowering plants)
• Plants that protect their seeds within the body
of a fruit.
• Make up ¾’s of all plants, including:
–Trees, shrubs, herbs,
grasses, water plants…

5. Which plants make fruit?
• Orange tree?
• Avocado tree?
• Pumpkin plant?
• Zucchini plant?
• Tomato plant?
• Wheat plant?
• THEY ALL MAKE FRUIT (Fruit is the edible part
that surrounds seeds).
Copy

6. The Stamen:
Male Reproductive Structure
Consists of two parts:
Anther and Filament
The filament is a stalk
that supports the anther
The anther is where
meiosis occurs to
produce pollen
Each pollen grain
contains sperm cells.
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7. The Pistil:
Female Reproductive Structure
Consists of the stigma,
style and ovary
The sticky stigma
receives the pollen
from the anther
The pollen grows a
tube down through the
style
Each ovule contains
an egg cell.
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8. Male Parts Female Parts
Stamen consists of:
1. Anther
2. Filament
Pistil consists of:
1. Stigma
2. Style
3. Ovary (ovules inside)

9. Reproductive Structures
• Petals: colorful
structures that attract
pollinators.
• Sepals: surround and
protect the flower bud.

10. Sepals: protect immature buds

11. Pollination
Wind, insects or other
animals transfer pollen
from the anther of one
flower to the stigma of
another
Flowers vary
depending on
pollination
mechanism

12. Pollination
Wind Pollination: Dull,
scentless
flowers with reduced petalsBees/Butterfly Pollination: Bright
color, nectaries, scent.
They sip nectar, get pollen on coats,
transfer pollen from flower to flower
Bird Pollination: Nectaries, bright
colors, tube-like flowers
Moth Pollination: White petals,
open at night
Fly Pollination:Rank odor, flesh
colored petals

13. Tip of a tulip stamen
with many grains of
pollen.

14. Scanning electron
microscope image of
pollen grains from a
variety of common
plants: sunflower,
morning glory, prairie
hollyhock, oriental lily,
evening primrose, and
castor bean.

15. • Pollen Grain • Anther Sac
Pollen grains contain two haploid cells produced through
meiosis.
1- The Tube cell – will grow the pollen tube.
2- The Generative cell – will go through meiosis to
create two sperm cells.
tube cell
generative
cell

16. This slide is FYI –
copy whatever
you’d like

17. Seed and Fruit Development
After fertilization,
the petals and
sepals fall off
flower
Ovary “ripens”
into a fruit
The ovule
develops into a
seed
See Fig 13 on page 139 Life
Science Text

18. Seed Dispersal Mechanisms-
Allow plants to colonize new areas and avoid
shade of parent plant
Wind Dispersal - Flight mechanisms,
like parachutes, wings, etc.
Ex. Dandelion, maples, birch
Animal Dispersal - Fleshy fruits which
animals eat, drop undigested seeds in
feces or burrs which stick to
animals’ coats

19. Gravity Dispersal -
Heavy nuts fall to
ground and roll
ex. acorns
Water Dispersal - Plants
near water create floating
fruits
ex. coconuts