"Try to classify living things" Classification according to the characteristics of living things PPT courseware 3

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"Try to classify living things" Classification according to the characteristics of living things PPT courseware 3

1. Biological classification

1. Biological classification is a kind of _____________ that studies organisms. It mainly divides organisms into different _____________ such as species and genera based on their _____________.

2. The basis of biological classification is the characteristics of organisms in terms of _____________ and _____________. The basic unit of biological classification is _____________.

3. The significance of biological classification is to clarify the ______ relationship and _________ relationship between different biological groups, and to understand and protect _____________.

2. Classification of plants

1. Plant groups

2. Division of plant groups

3. Classification method

Carefully observe the _________ of plants and discover their common or different______ to determine their _________ relationship

Consider the following questions:

1. What are the six major organs of green flowering plants?

2. Do all plants have seeds?

3. Are the seeds covered with pericarp?

4. Do all plants have roots, stems, and leaves?

5. What is the function of rhizomes?

6. Are the leaf veins of all plants the same? What are the characteristics of parallel veins and reticular veins?

The law of plant evolution from low to high:

Living environment-----aquatic to terrestrial

Cells------single cells to multi-cells

Structure------from simple to complex

Basis for plant classification:

The morphological structure of plants is used as the basis for classification.

In angiosperms, flowers, fruits, and seeds are often used as important basis for classification.

Cooperation and exchange

1. Why are flowers, fruits and seeds used as important basis for plant classification?

These reproductive organs appear relatively late in the life of plants, have a relatively short survival time, are less affected by environmental conditions, and have relatively stable morphological structures.

2. Try to rank the main groups of plants from simple to complex?

Algae, bryophytes, ferns, gymnosperms, angiosperms

Exercise: Fill in the blanks

Among all plant groups, plants that can produce seeds are called __________, which are further divided into __________ and __________; the other type is __________ plants, which reproduce by __________, which are also divided into_ __________ plants, __________ plants and __________ plants.

Compared with corn, sunflower and pine trees, the seeds of the former two are covered with __________, so they are called ________ plants. Compared with corn and sunflower, sunflower seeds have ________ cotyledons, so they are called ________ plants, while corn is a ________ plant.

Consolidation exercises

True or False:

1. Plants with seeds have roots. ( )

2. Corn has 2 cotyledons and sunflower has one. ( )

3. Green flowering plants are angiosperms and gymnosperms. ( )

4． Calabash moss has roots. ( )

1. If you want to know about the morphological characteristics and living habits of bees, which of the following books should you look for ( )

A. "Entomology" B. "Amphibianology"

C. "Ornithology" D. "Mammalogy"

2. The main purpose of classifying organisms does not include ( )

A. Understand biological diversity

B. Understand the biological relationships between organisms

C. Understand the evolutionary relationships between organisms

D. Understand the harmful and beneficial species of organisms

3. The main basis for classifying angiosperms is ( )

A. Roots, stems, leaves B. Roots, stems, leaves and fruits

C. Flowers, fruits and seeds D. Leaves, fruits and seeds

4. Please be a little taxonomist: According to the same classification level, seed plants can be divided into: ( )

A. Monocots and Gymnosperms

B． Dicotyledons and Gymnosperms

C. Gymnosperms and angiosperms

D. angiosperms and monocots

5. Students in the biology team classified the investigated campus plants. They classify pitch pine, cedar, cycad, and metasequoia into one category, and classify weeping willow, poplar, camphor tree, and magnolia into another category. What criteria do they classify according to: ( )

A. According to the economic value of the plant B. According to the ornamental value of the plant

C. According to the plant’s living environment D. According to the plant’s morphological structure

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"Trying to Classify Organisms" Classification according to the characteristics of organisms PPT courseware 9:

"Trying to Classify Organisms" Classifying Organisms Based on Their Characteristics PPT Courseware 9 Reviewing the Past and Learning the New 1. Do all plants have seeds? 2. Do all plants have roots, stems, and leaves? 3. What is the function of roots? 4. Are the seeds covered with pericarp? 5...

"Trying to Classify Organisms" Classification according to the characteristics of organisms PPT courseware 8:

"Trying to Classify Organisms" Classifying Organisms Based on Their Characteristics PPT Courseware 8 By studying this section, you will know: 1. What is the basis for classifying organisms? 2. How to classify organisms according to their characteristics? 3. What is the purpose of biological classification?

"Trying to Classify Organisms" Classification according to the characteristics of organisms PPT courseware 7:

"Trying to Classify Organisms" Classifying Organisms Based on Their Characteristics PPT Courseware 7 Teaching Objectives: 1. What is the basis for classifying organisms? 2. How to classify organisms according to their characteristics? Think about it and discuss it. If you want to know about the life of the cabbage butterfly...

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Update Time: 2024-07-29

This template belongs to biology courseware People's Education Edition Biology for Grade 8, Volume 1 industry PPT template

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