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Authoritative PPT Summary
"Structure and Function of Ecosystems" PPT
Part One: Situation Import
Analyze the relationship between some organisms in the grassland ecosystem
1. What role do plants on grasslands play in the ecosystem?
2. What is the relationship between the various animals on the grassland and the vegetation on the grassland?
3. What are the relationships between various animals on the grassland?
4. Try to connect the relationships between various organisms in the grassland ecosystem with lines.
learning target
1. Understand the components of the ecosystem, understand the functional status and interrelationships of the four components of the ecosystem, master the concept of trophic levels and the relationship between trophic levels and the food chain.
2. Cultivate the thinking ability of comprehensive analysis and reasoning by guiding students to summarize the components of the ecosystem and analyze the nutritional structure of the ecosystem.
PPT on the structure and function of ecosystems, part 2: course exploration
Explore theme one
food chain
The chain-like relationship formed between different organisms due to food relationships
Explore theme two
food web
In an ecosystem, are there connections between organisms in different food chains?
Food chains are interconnected to form a complex network structure called a food web.
Answer the questions based on the picture above:
1. This food web has ______ food chains, the longest of which is _______________.
2.The relationship between spiders and toads in the food web is _______________.
3. There are ________ food chains related to owls.
4. If the number of insect-eating birds decreases for some reason, the number of toads may ____________.
5. If all the owls were to move away, the number of other animals that might be significantly reduced would be __________________.
PPT on the structure and function of the ecosystem, part three: training to meet standards
1. Please indicate which of the following four food chains is correct ( )
A. Sunshine → Grass → Rabbit → Wolf B. Grass → Insects → Frog → Snake
C. snake → frog → insect → grass D. grass → locust → bacteria and fungi
2. Among the following food chains, which statement is correct ( )
A. Grass → grasshopper → insect-eating bird → eagle → snake
B. clams → grass → herbivorous birds → eagle → fox
C.Fox→hawk→insectivore bird→grasshopper→grass
D. Grass → grasshopper → insect-eating bird → snake → eagle
3. According to reports, there are 101 ancient cypresses and 3 ancient locust trees in the Confucius Temple in Beijing. The trees are more than 700 years old, and the shortest ones are more than 100 years old. The weather-beaten tree trunks show signs of being eaten away by pests. According to the survey, there are six kinds of animals on the ancient trees, including red spider mites, aphids, lacewings, seven-spotted ladybugs, sparrows, and flower magpies. The relationship between them can be represented by the following simple food web diagram.
Please answer the following questions using the diagram:
(1) The red spider mites and aphids in this food web are pests that harm ancient trees. They are ______ among the components of the ecosystem.
(2)The longest food chain in this food web is ______.
(3) Please write down the shortest food chain ____________.
Keywords: Free download of Biology PPT courseware for the second volume of the eighth grade edition of Beijing Normal University, PPT download of the structure and function of ecosystems, .PPT format;
For more information about the "Structure and Function of Ecosystems Ecosystems and Their Stability" PPT courseware, please click the "Structure and Function of Ecosystems ppt Ecosystems and Their Stability ppt" tag.
"Structure and Function of Ecosystems" PPT teaching courseware:
The first part of the PPT teaching courseware "Structure and Function of Ecosystems" content: Pre-class exercises: 1. The factors that affect the ____, ____, __, etc. of organisms are called ecological factors; they can be divided into __________ and __________ categories, and biological factors refer to Their living environment...
"Structure and Function of Ecosystems" PPT courseware download:
"Structure and Function of Ecosystems" PPT courseware download Part One: New Lesson Introduction Living things must continuously ingest food to obtain energy. Where do these substances and energy originally come from? How is it transmitted in the ecosystem? Learning objectives 1. Explain the ecosystem...
"Structure and Function of Ecosystems" PPT download:
"Structure and Function of Ecosystems" PPT Download Part One: Situation Introduction The mantis stalks the cicada, and the oriole follows behind. What biological phenomenon is it talking about? Learning Objectives 1. Understand the components of ecosystems and the interrelationships among them. 2. Understand the concepts of food chain and food web..