5th grade ch. 4 lesson 3 how do plants reproduce
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Ch. 4 Lesson 3How do plants reproduce?
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petals•colorful
•attract animals
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stamen
•male part of flower
•makes pollen
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anther
•@ tips of stamens
•make pollen
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• female part of flower
pistil
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imperfect flowers• flowers that do not have both stamens & pistils Passion Flower
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composite flower• 1 flower made of 100’s of flowers
sunflower
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stigma•sticky part of pistil
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1.2.
3.
4.
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sexual reproduction
•passing of DNA from 2 parents to offspring
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pollination• movement of pollen from stamen pistil
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Pollinators
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petal stamen sepal
stigma pistil anther
pollen egg cell ovary
______________
_______
______________
______________
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Sarracenia flower dissection
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•when sperm & egg cell combine DNA
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embryo•new plant protected by seed coat
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•taproot•fibrous
roots
•leaf has
veins that
branch out
•leaf has
parallel veins
•2 areas of stored food •easily split apart•seeds have
2 cotyledons
•1 area of
stored food•seeds have
1 cotyledon corn
dicotmonocot
bean
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monocot• plant whose seeds have 1 cotyledon
Monocot seed: a – Seedcoatb – Endospermc – Cotyledond - Embryo
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dicot• plant whose seeds
have 2 cotyledons
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A - seedcoat, B - endosperm, C - cotyledons, D - embryo
Dicot seedMonocot seed
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dicotmonocot or dicot ?
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monocotmonocot or dicot ?
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ways that seeds spread :
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Coconuts -seeds
scattered by water.
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animals help scatter seeds
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carried by animals
bur
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asexual reproduction
• 2 ways: runners & budding
• only 1 parent (no sperm or egg cells)
• offspring have same genes as parent
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Spider plants are common houseplants
that can reproduce by growing new
plants on long stems called
runners.
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Duckweed is a tiny plant that floats on ponds and is food for ducks and other birds.
It is one of the smallest flowering plants, but it reproduces mostly by a kind of asexual reproduction called budding. Little buds form on the plant and drop off to grow as separateplants.