UNIT

4The reproduction function

Natural Science 2. Secondary Education

CLASSIFYING PLANTS

UNIT

4Classifying plants

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SEEDLESS PLANTS

GYMNOSPERMS ANGIOSPERMS

are classified as

which can be

PLANTS WITHSEEDS

PLANTS

Natural Science 2. Secondary Education

• They do not have flowers, and they produce neither fruits nor seeds.

• Reproduction occurs through the alternation of generations and they disperse via spores.

• Two common examples are mosses and ferns.

Seedless plants

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Moss Fern

UNIT

4Classifying plants

Natural Science 2. Secondary Education

• Their flowers are not particularly attractive and they almost always form structures called cones, often with separate genders.

• Instead of producing fruit, the female cones mature into developed cones which contain seeds.

• Some examples of gymnosperms are pine trees, firs and junipers.

Gymnosperms

Female cone

Male cone

Seed

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4Classifying plants

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Natural Science 2. Secondary Education

• Their flowers are generally attractive. They produce fruit, which contain seeds.

•There are many different angiosperms, from small grasses to large trees.

Angiosperms

Seed

Flower with androecium (stamen) and gynoecium (pistil)

UNIT

4Classifying plants

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Natural Science 2. Secondary Education