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Plant Notes
Topic: Seeds, Roots, Flowers, Dispersal
Chapter #, Section #: p. 31-50
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Questions / Main Ideas /
Vocabulary
p. 31 Seeds &Roots
Dormant
Alive but not active.
Seed coat
Tough layer that protects embryo
Embryo
“baby” plant; beginnings of root, stem, and leaves
Cotyledon
Supply food energy until they photosynthesize
Germination
Process where dormant seed grows into a plant
Root comes out first for water
Root
Root hairs
Xylem
Collect water/minerals & anchor/support plant
Increase root’s surface area to absorb more water
Carries water through roots and stem
Fibrous root
Monocot root
Taproot
Dicot root
Stems & Leaves p. 35
Stems
Holds leaves and flowers in position & carries water to them
Leaves
Photosynthesis
Photosynthesis
Inputs  water + light + CO2
Outputs  oxygen + glucose
Chlorophyll
Retaining Water
Notes / Structure/Function/ Definitions / Examples / Sentences
Water Conservation
1. guard cells close stomates 2. stomates in pits to keep out of
Wind. 3. leaves have waxy or oily coating 4. thick to concentrate
Water. Thin leaves lose water fast!
p. 40 Flowers to Seeds
Sexual reproduction
Petals
Sepals
Stamens
Filament
Anther
Two parents
Showy to attract pollinators
Leafy protectors of flower bud; supports petals
Male part of flower
Holds anther in place to expose to wind or animals
Makes/holds pollen
Pollen
Sperm
Small grains that contain sperm
Male sex cell
Pistil
Stigma
Ovary
Ovules
Eggs
Fertilized
Pollination
Pollinators
Female part of flower
Sticky to collect pollen from wind or animal
Protects seeds/ becomes fruit
Make/contain eggs
Female sex cell
Sperm and egg unite
Pollen reaches stigma
Help pollination; like bees, butterflies, moths, bats, hummingbirds
After Pollination
Wind
Flower does not need to be pretty anymore because it’s already
Attracted a pollinator. Focuses on seeds and dispersal.
p. 46 Seeds on the Move
Wind
Dandelions, maple seeds (helicopter), tumbleweed
Water
Coconuts
Animals
Seeds stick to fur/feathers or go through digestive system
Ejection
Flower part explodes…BOOM!
A dormant seed germinates. Root comes out and develops first. Stem and leaves emerge to
Photosynthesize in the sun, cotyledon falls away. Matures and develops flowers. Gives off
Pollen and receives pollen (pollination). Egg is fertilized, seed and fruit develop. Seed is
Dispersed and remains dormant until the conditions are right.