"Biological Community" PPT

Description

"Biological Community" PPT

Part One: Biome (community)

(1) Concept: The sum of all biological populations in a certain environment is called a biological community, or community for short.

All living things: animals, plants, microorganisms

Biomes have the following key points

① Within a certain natural area (within a certain range such as a pool, a grassland or a forest)

② There is a direct or indirect relationship between each other (mutual influence and mutual restriction).

③The sum of various living things (including plants, animals and microorganisms)

Biome PPT, part 2: exercises

1. In a forest, a community refers to the [ ]

A． All treesB. all animals and plants

C. All living things and the inorganic environment D. all living things

2. Among the following examples, those belonging to the biological community are [ ]

A． All larvae and adults of locusts in a field of grass;

B. All the fungi on a piece of rotten wood;

C. A dead tree and its fresh moss, fungi, insects, snails, etc.;

D. All rice, aquatic plants, fish, shrimp and other organisms in a paddy field

Biome PPT, Part 3: The stratification phenomenon of biomes

A similar stratification phenomenon exists in pond communities. Can you talk about the benefits of mixing the four major fish species in freshwater fish farming?

Silver carp moves in the upper layers of the water and eats green algae and other phytoplankton;

Bighead carp live in the middle and upper layers of the water and eat protozoa, water fleas and other zooplankton;

Grass carp lives in the middle and lower layers of waters and feeds on aquatic plants;

Black carp inhabits the bottom of the water and eats molluscs such as snails, clams and mussels;

Mixed feeding of these four kinds of fish can improve the utilization rate of bait and increase fish production.

According to the relationship between the vertical structure of the community, the space and conditions of different water layers are fully utilized to obtain high yields.

Biome PPT, Part 4: In-class exercises

1. The sum of all ____ in a certain living environment is called a biological community, or ____ for short.

2. The sum of all plants living in a certain natural area is called __________. The total number of plants covering the earth's surface is called __________.

3. Which of the following descriptions belongs to a community ( )

A. All the locusts in a meadow

D. Rice in a rice field

C. All organisms in a pond

D. All masson pines in a forest

4. There is an obvious stratification phenomenon in the forest community. From high to low, the second layer is ( )

A. Tree layer B. Shrub layer

C. Herbaceous plant layer D. moss lichen layer

5. The one who plays a leading role in the community is ( )

A. Microorganisms B. Animals

C. Plants D. flora and fauna

Keywords: Free download of science PPT courseware for the second volume of the ninth grade of Zhejiang Education Edition, download of biotope PPT, .PPT format;

For more information about the "Biome" PPT courseware, please click the "Biome" ppt tab.

"Biological Community" PPT courseware:

"Biological Community" PPT courseware Part One Content: Biome Concept: The sum of all biological populations in a certain environment is called a biome, or community for short. There is a certain relationship between the organisms in the community, and under the influence of certain environmental factors...

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Update Time: 2024-11-18

This template belongs to science courseware Zhejiang Education Edition Ninth Grade Science Volume 2 industry PPT template

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