"Try to classify living things" PPT courseware for classifying living things according to their characteristics

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"Try to classify living things" PPT courseware for classifying living things according to their characteristics

Learn about biological classification

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

What is the basis for biological classification?

What is the basic unit of biological classification?

biological classification

According to the degree of similarity of organisms, organisms are divided into different levels such as species and genera, and the morphological structure, physiological functions and other characteristics of each group are scientifically described.

Purpose of classification:

Understand the genetic and evolutionary relationships between different biological groups

Basis for classification:

Characteristics such as morphological structure and physiological function

The basic unit of classification: species

discuss

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

A corn; B sunflower; C pine;

D. kidney fern; E. cucurbita; F. Spirogyra.

Do all types of plants A, B, C, D, E, and F belong to the same classification level?

Answer: Different. AB is at the same level, DEF is at the same level

What groups can plants with seeds be classified into?

Answer: Seed plants are divided into gymnosperms and angiosperms.

Angiosperms are further divided into monocots and dicots.

What groups can seedless plants be classified into?

Answer: Spore plants are divided into: algae, bryophytes, and ferns.

Knowledge summary:

What is the basis for plant classification?

are the morphological and structural characteristics of plants

Such as: morphological and structural characteristics of roots, stems, leaves, flowers, fruits, and seeds.

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

Exercise 1

Which of the following statements about biological classification is incorrect ( )

A. The basic unit of classification is species

B. Classification is based on the characteristics of organisms in terms of morphological structure and other aspects.

C. Scientific classification of organisms is the basis for understanding and protecting biological diversity.

D. In angiosperms, roots, stems, and leaves are often used as important basis for classification.

The similarities between gymnosperms and angiosperms are ( ).

A. Both have fruits

B. Both have seeds

C. Both have flowers

D.Both have no real roots

Pine, bamboo, and plum are called the "Three Friends of Suihan". These three plants belong to ( ) in terms of classification.

A. Pine is a gymnosperm, bamboo and plum are monocots.

B. Pines are gymnosperms, bamboo and plum are angiosperms

C. Pine is a gymnosperm, while bamboo and plum are dicots.

D. Pines are gymnosperms, bamboos and plums are ferns.

Basis for animal classification: Comparison of external morphological structures and physiological functions.

Bacteria are divided into three categories based on their shape: cocci, bacilli, and spirillida

Fungi can be divided into groups such as yeasts and molds based on their morphological structures.

Classification

The skill of classification is not only useful in scientific inquiry, but is also often used in work and life. Now, suppose you work in a food store and need to classify various foods on the shelves. How to classify them so that both you and customers can easily find certain foods?

You can use the classification method learned in this lesson to list 3 to 5 major categories of food according to the commonalities and differences between foods, such as meat, eggs, milk, snacks, condiments, etc., and then refer to the condiments below Examples of classification, further classifying a certain category of food

Homework

1. Decide whether the following statements are correct. Draw a "V" if it is correct and an "×" if it is incorrect.

(1) The morphological structures of roots, stems, leaves, flowers, fruits, and seeds of angiosperms can be used as the basis for classification. ( )

(2) In addition to comparing morphological structures, animal classification often also requires comparing physiological functions. ( )

2. In angiosperms, flowers, fruits and seeds are often used as important basis for classification. Please try to analyze the reasons why scientists do this.

Answer: The flowers, fruits, and seeds of plants have a short growth period, are less affected by the environment, and have relatively stable morphological structures, which can accurately reflect the evolution and genetic relationships between different plants.

Exercise 1: 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.

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Update Time: 2024-11-22

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

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