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Ch. 4 Lesson 3How do plants reproduce?
petals•colorful
•attract animals
stamen
•male part of flower
•makes pollen
anther
•@ tips of stamens
•make pollen
• female part of flower
pistil
imperfect flowers• flowers that do not have both stamens & pistils Passion Flower
composite flower• 1 flower made of 100’s of flowers
sunflower
stigma•sticky part of pistil
1.2.
3.
4.
sexual reproduction
•passing of DNA from 2 parents to offspring
pollination• movement of pollen from stamen pistil
Pollinators
petal stamen sepal
stigma pistil anther
pollen egg cell ovary
______________
_______
______________
______________
Sarracenia flower dissection
•when sperm & egg cell combine DNA
embryo•new plant protected by seed coat
•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
monocot• plant whose seeds have 1 cotyledon
Monocot seed: a – Seedcoatb – Endospermc – Cotyledond - Embryo
dicot• plant whose seeds
have 2 cotyledons
A - seedcoat, B - endosperm, C - cotyledons, D - embryo
Dicot seedMonocot seed
dicotmonocot or dicot ?
monocotmonocot or dicot ?
ways that seeds spread :
Coconuts -seeds
scattered by water.
animals help scatter seeds
carried by animals
bur
asexual reproduction
• 2 ways: runners & budding
• only 1 parent (no sperm or egg cells)
• offspring have same genes as parent
Spider plants are common houseplants
that can reproduce by growing new
plants on long stems called
runners.
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.