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.