"Classification of Organisms" PPT

"Classification of Organisms" PPT

Part One: Situation Import

Story: Everyone must have been to the supermarket. The products in the supermarket are not placed in a haphazard manner, but are generally placed according to categories such as food, clothes, shoes and hats, laundry, electronic products, etc. Even more detailed, for example, food is classified into frozen, beverages, meat products, packaged foods, etc. What are the benefits of placing them in this way?

In life, some things that are classified and arranged according to rules bring us a lot of convenience. Our biological research is no exception.

learning target

1. Try to classify plants and animals based on their characteristics.

2. List the main groups of plants.

3. List the main groups of animals.

4. Cultivate students’ abilities of observation, thinking, comparison, analysis and judgment.

Classification of living things PPT, part 2 content: exploration theme

Learn about biological classification

1. What is biological classification? What is the purpose of biological classification?

Biological classification is a basic method for studying organisms. It divides organisms into different levels such as species and genera based on the degree of similarity of organisms, and scientifically describes the morphological structure and other characteristics of each group to clarify the differences between different groups. phylogeny and evolutionary relationships.

2. What is the basis for biological classification?

The basis of biological classification is the characteristics of organisms in terms of morphological structure and other aspects.

3. What is the basic unit of biological classification?

The basic unit of biological classification is the species.

Observe and think

1. Which type of plants do the plants in the picture belong to A, B, C, D, E, and F?

2. Name each plant group A, B, C, D, E, F in the picture.

3. Do the plants A, B, C, D, E, and F in the picture belong to the same classification level?

Classification of living things PPT, the third part: plant groups

1. Spore plants

(1) Algae plants: have no differentiation of roots, stems, and leaves, and rely on spores to reproduce their offspring.

(2) Bryophytes: Some have stems, leaves, and only rhizoids (rhizoids are not roots, they are just fixed plants and cannot absorb water and inorganic salts), and they reproduce by spores.

(3) Ferns: have roots, stems, leaves, no flowers, no fruits and seeds, and rely on spores to reproduce.

2. Seed plants

Gymnosperms: developed roots, stems, and leaves, exposed seeds, and no pericarp covering.

Angiosperms: have roots, stems, leaves, flowers, fruits, and seeds. The seeds are not exposed and are covered with pericarp.

Monocotyledonous plants: There is a cotyledon in the seed embryo, and the leaf veins are generally parallel veins.

Dicotyledonous plants: There are two cotyledons in the seed embryo, and the leaf veins are generally reticular veins.

Classification of living things PPT, part 4 content: Classification of animals

hint

1. In addition to comparing morphological structures, animals are often classified based on comparing internal structures and physiological functions.

2. Separate the 10 animals according to the classification of plants.

3. When classifying, the 10 animals can be divided into two groups according to the presence or absence of vertebrae in the body, and then classified according to the characteristics of each animal.

4. Different animal groups should be arranged in order from simple to complex.

5. List these animals into the corresponding positions in the table.

Organize and summarize

1. What is the basis for animal classification?

In addition to comparing external morphological structures, animal classification often also requires comparing internal structures and physiological functions of animals.

2. What are the main groups of animals from simple to complex?

Invertebrates: protozoa, coelenterates, platyhelminthes, linear animals, annelids, molluscs, arthropods, etc.

Vertebrates: fish, amphibians, reptiles, birds, mammals.

Classification of living things PPT, part 5: training to meet standards

1. Which of the following items is not used as the main basis for animal classification ( )

A.External morphology and structure

B. Internal structure

C.Physiological functions

D.Body size

2. When Xiao Ming classifies plants, he puts rice, watermelon, and pine trees into one category, and kelp, moss, and ferns into one category. His classification basis is ( )

A． Seeded and seedless

B． Herbaceous and woody stems

C． Rooted and rootless

D． Living on land and living in water

3. The following is the closest relative to rice ( )

A． pine

B． wheat

C． kidney fern

D． Chlamydomonas

Keywords: Beijing Normal University edition eighth grade biology PPT courseware for volume 2 free download, classification of biology PPT download, .PPT format;

For more information about the PPT courseware "Diversity of Species and Classification of Biological Organisms", please click the Diversity of Species PPT and Classification of Biological Organisms PPT tag.

"Classification of Organisms" PPT courseware download:

"Classification of Biological Organisms" PPT courseware download part one content: The purpose of this section is to give examples of the basis for classification and give examples of the levels of biological classification. Try to classify organisms according to certain characteristics... Classification of Biological Organisms PPT, Part Two: Theme Exploration..

"Classification of Organisms" PPT download:

"Classification of Organisms" PPT download Part 1: The method used by scientists to classify organisms. Different organisms can be classified based on the degree of difference in biological traits and the distance of biological relationships. According to this principle, biologists classify the existing organisms on the earth...

"Classification of Organisms" PPT courseware:

"Classification of Organisms" PPT Courseware Part One: Scenario Introduction There are about 350,000 species of plants and more than 1.5 million species of animals on the earth. Some of them have similar morphological structures, and some are vastly different from each other. How do we identify these various species of organisms? Learning objectives 1. ..