"Various Plants" Biological Diversity PPT Courseware 4

"Various Plants" Biological Diversity PPT Courseware 4

Use classification methods to classify the plants above

According to their different living environments, they can be divided into aquatic plants and terrestrial plants: lotus is an aquatic plant, and other plants are terrestrial plants;

According to whether they are deciduous or not, they are divided into evergreen plants and deciduous plants: cedar and juniper are evergreen plants, while others are deciduous plants;

According to the different stems, they can be divided into herbaceous plants and woody plants: lotus magnolia, boxwood, cedar, juniper, etc. are woody plants, while cowgrass, chicory, etc. are herbaceous plants, and so on.

Knowledge expansion

Woody plants refer to solid plants whose roots and stems thicken and grow to form a large amount of xylem, and the cell walls are mostly lignified. They are the counterpart of herbaceous plants. The aboveground part is perennial, divided into trees and shrubs.

Herbs are a general term for a class of plants, but they are not a unit in the scientific classification of plants. The concept corresponding to herbaceous plants is woody plants. People usually call herbaceous plants "grass" and woody plants " "Tree", but there are occasional exceptions, such as bamboo, which is a herbaceous plant, but people often regard it as a tree.

Plants can be divided into different categories based on different criteria

For example, plants can be divided into aquatic and terrestrial according to their living environment;

According to the characteristics of the stem, it can be divided into herbaceous plants and woody plants;

According to the needs of human consumption, it can be divided into vegetables, fruits, grains, medicinal materials, etc.;

Classification is a basic method for studying plants.

Scientists divide plants into:

Flowering plants and non-flowering plants.

Class summary

1. Plants can be divided into flowering plants and non-flowering plants.

2. Non-flowering plants include ferns, mosses and algae.

3. Classification is the basic method for studying organisms.

1. True or False Questions (mark √ if correct, × if incorrect)

1. Grasses are herbaceous plants, and large trees are woody plants. ( )

2. Small plants must be herbaceous plants, and tall plants must be woody plants. ( )

3. Pay attention to protecting flowers, plants and trees during observation activities. ( )

4. The leaves of all plants are green and they will bloom and bear fruit. ( )

5. Pine and cypress are non-flowering plants. ( )

6. Figs, like mushrooms, are non-flowering plants. ( )

7. Ferns, fungi, mosses, algae, and flowering plants, carry out photosynthesis to produce nutrients. ( )

2. Multiple choice questions

1. ( ) can grow normally under relatively sunny conditions, and ( ) can grow normally under humid conditions.

A. Shade-loving plants B. Sun-loving plants

2. ( ) refers to trees or shrubs that are green all year round. ( ) refers to trees that have lost all their leaves in winter.

A. Evergreen trees B. Deciduous trees

3. Among the following plants, which one cannot perform photosynthesis ( )

A fern B algae

C bryophytes D fungi

4. Among the following plants, which one is a green non-flowering plant ( ).

A． pine tree b. Willow c. moss

5. The air in the woods is relatively clean and fresh because the leaves undergo ( ) and release oxygen into the air.

A. Photosynthesis B. Transpiration C. Evaporation

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