"Main Groups of Plants" PPT courseware download

Description

"Main Groups of Plants" PPT courseware download

Part One: Scenario Introduction

The most important organisms in the biosphere are probably green plants. Green plants are producers in the biosphere. They provide food for consumers in the biosphere. There are many types of green plants in various shapes. Do you know how many types of green plants there are in the biosphere? What groups do they have? Can you tell me about their living environment?

learning target

1. Preliminarily understand the plant phylogenetic tree;

2. Understand the genetic relationships between different plant types;

3. Through the activity of "observing and comparing different plants" and various learning activities about plant groups, understand the morphology, structural characteristics, lifestyle, and relationship between different plant groups and humans.

PPT on the main groups of plants, part 2: observing and comparing different plants

Purpose requirements:

Observe representative plants of various groups, describe the morphological characteristics of plants of each group, and compare the morphological characteristics of plants of different groups. Take a look, what are the sizes of the plants and leaves of different plants?

Distinguish it, what is the difference in the organ composition of moss and fern compared with rapeseed?

Look for any "veins" on the leaves of each plant? What does it mean?

Touch it, how hard are the different plants? How thick are the leaves?

Think about it, why are ferns taller than bryophytes?

Compare, what are the structural differences between bryophytes and ferns?

discuss

1. What environment do these algae plants live in?

2. How are the shapes of algae plants different from the common terrestrial plants you usually see? Do they have specialized roots, stems, leaves and other organs?

3. What role do algae plants play in the biosphere? What does it have to do with human life?

PPT of the main groups of plants, the third part: classification of plants

Ferns

Ferns generally grow in moist areas of forests and mountains.

The morphological structure of ferns

1. Compared with bryophytes, what are the characteristics of the morphological structure of ferns?

2. Why do ferns grow taller than bryophytes?

seed plant

Seed plants are the highest group of plants. all

Seed plants all have two basic characteristics:

(1) There are vascular tissues in the body - phloem and xylem;

(2) Can produce seeds and use seeds to reproduce offspring.

seed plant

Gymnosperms: seeds are exposed and have no outer pericarp covering.

Angiosperms: Seeds are covered with pericarp

Gymnosperms

Gymnosperms are mainly distributed in temperate regions, as well as in tropical and subtropical mountainous areas with higher altitudes. There are about 800 kinds of gymnosperms in the world, and there are more than 250 kinds in my country, which is known as the "Hometown of Gymnosperms". Most of the common ones are trees, which are the main tree species constituting the forests in northern my country and are also common greening tree species in various places.

angiosperms

Angiosperms are the plant group with the highest level, the most variety, the widest distribution, and the closest relationship with humans in the plant kingdom. There are about 250,000 species, and there are more than 30,000 species in my country.

angiosperms

Monocots: Leaves mostly have parallel veins and petals are 3 or multiples of 3.

Dicotyledonous plants: leaves mostly with reticulate veins and petals of 4, 5 or multiples thereof

PPT of the main groups of plants, part 4: learning and detection

1. Algae are a type of lower plants. The reason is ( )

A. Mainly lives in water B. Can perform photosynthesis

C. Plants are very small D. There is no differentiation of roots, stems and leaves

2. Put a ball of living Spirogyra into a glass filled with water and put it in a dark place. After one month, Spirogyra will ( )

A. All die B. Grow better

C. Dormancy D. Normal growth

3. In bryophytes, the structure that plays a role in fixation is ( )

A. Root B. Root-like substance

C. False root D. Adventitious root

Keywords: Free download of Biology PPT courseware for the second volume of the eighth grade edition of Beijing Normal University, PPT download of the main groups of plants, .PPT format;

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Update Time: 2024-07-07

This template belongs to biology courseware Beijing Normal University Edition Eighth Grade Biology Volume 2 industry PPT template

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