Discovering Plants

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Parts of Plants•Roots•Flowers•Stem•Leaves More

Roots Are usually

subterranean

organ of a plant

used for the

anchorage to the

soilBack

FlowersA

reproductive organ of the seed

bearing

plants .

Back

StemAn aerial

and upright part of

the plant that

usually bears the leaves, flowers,

and fruits

Back

Leavesa flat broad

structure responsible for the

production of food,

transpiration, and

respirationBack

• How Plants Grow and Multiply and its part.

• Changes in a germinating seed

• Factors in Seed Germination and Growth

• Seed and Fruit Dispersal Propagating Plants Asexually

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HOW PLANTS GROW AND MULTIPLY

Sexual Reproduction Most plants grow from seedsThese plants have parts that are

responsible in the making of seeds.These seed-making parts of plants are

found in the flowers.

Are parts of a flower that are responsible in the making of seeds in floweringplants

Stamen and Pistilis the male reproductive organ.Anther- ovoid structure at its tipPollen Grains- bear by antherFilament-stalk of the flower

Stamen is the male

reproductive organ.

• Anther- ovoid structure at its tip

• Pollen Grains- bear by anther

• Filament-stalk of the flower

Pistil• Stigma• Style• Ovary• Ovules

An egg cell is formed in the ovule.

The ovules, after fertilization, will develop into seeds and the ovary surrounding it becomes the fruits in most plants.

Parts of a flower

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What is the Role of Pollination?

One important function of the flower is to produce seeds. but, how?

If seeds are to be produced, the pollen grains from the anther must land on the stigma.

What is pollination?Is the first step in the process of

development of seeds in plants.Occurs mainly by wind and by

animals such as insects and birds.

Two types of PollinationSelf-pollinationWhen pollen

from a plant’s anther is transferred to that same plant’s stigma.

Cross-pollinationWhen pollen

from a plant’s anther is transferred to another plant’s stigma.

Fertilization and development of the seed

Fertilization – is the union of sperm cells and egg cells.

after fertilization the ovules gradually transform into mature seeds and the ovaries into fruits.

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