Transcript What is the Life Cycle of a Plant?

What is the Life Cycle of a
Plant?
Lesson 4
New Plants

New plants form from:



Seeds
Spores
Other plant parts (stems, leaves, or roots)
Plants from Plant Parts
 Not
all plants grow from seeds or spores
 Tulips do not start with seeds; they have a
bulb

A bulb is a type of underground stem
A
farmer can take branches from a strong apple
tree and join them to the branches of an apple
tree that has strong roots. This is called
grafting
Parts of a Seed

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Seed Coat– protects seed
Cotyledon—stored food
• Embryo (baby
plant)—beginning
leaves, stem and
root
Embryo
—baby
plant
Seeds
• Seeds are formed in the center part of the
flower or in the fruit. Fruits come from
flowers.
• Seeds come in many shapes and sizes.
• Plants grow from seeds.
If a seed receives water and gets warm, the baby
plant (embryo) inside it starts to grow.
•The process of a baby plant beginning to
grow is called germination. We say the
seed germinates or sprouts.
•The first part of the
plant we see pushing
its way out of the
seed coat is the
root.
Bean Seed: Dicot
Corn Seed: Monocot
Here we see
pictures of a
bean seed and
a corn seed
germinating
(sprouting) and
growing into
plants with
roots, stems and
leaves.
Dicot
Monocot


Has 1 cotyledons (food
storage)
Example: Corn Seed
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Has 2 cotyledons (food
storage)
Example: Bean Seed
The flowers
make seeds.
The seeds are
scattered—
ready to grow.
The seed absorbs
water.
The root pushes
through the seed
coat.
Life Cycle of a
Bean Plant
The stem and
its leaves
grow toward
the sunlight.
The leaves
make food for
the plant.
The seedling
(new plant)
grows out of
the ground.
Life Cycle of A Seed
How Seeds Travel

Animal Helpers:
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Stick to animal fur (some seeds are shaped like a hook)
Animals eat fruit (which has seeds).
 Seeds

Some animals gather and bury seeds (squirrels)
 Some

seeds stay dormant: in a state of rest.
Blow in the Wind:


can end up on the ground from the animal droppings
Example: Dandelions (“wish flowers”)
Water Traveler:
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Coconuts are a type of seed that can float on water
Starting with the seed (number 1).
Number and cut into the correct order
1.
Roles of Roots
The Roles of Roots
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Roots: Anchor the plant firmly into the ground
Because most roots are underground, they can absorb, or
take in, water and mineral nutrients from the soil around
them
Root cells do not contain chlorophyll ( this is why they
are not green). However, some roots do store food
Types of Roots
Fibrous Roots
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Fibrous roots are roots
that grow in many
different directions
Most grasses and trees
have fibrous roots
Plants that grow in hot,
dry areas also have
fibrous roots
Taproots
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Taproots grow straight
down. It looks like the
root has hairs
Carrots, turnups, and
dandelions have a
taproot system