Chapter 1 Understanding Biology
The first section biological characteristics
The second part investigates the creatures around us
Chapter II The biosphere is the home of all living things.
Section 1 Biosphere
In the second quarter, the influence of environment on living things
The third quarter biological adaptation and influence to the environment
Section 4 Ecosystem
New tasks of forestry professionals related to biology
Science? Technology? Social Biosphere II
Unit 2 Organisms and Cells
The first chapter is to observe the cell structure.
Section 1 Practice using a microscope
Science? Technology? Society from ancient optical microscope to electron microscope.
Section 2 Observation of Plant Cells
Section III Observation of Animal Cells
The story of scientists Schleiden, Wang Shi and cell theory
Chapter II Cell Life
Section 1 Cell life needs matter and energy
Section 2 The nucleus is the genetic information base
The story of a scientist who discovered the magical substance nucleic acid in cells.
The third part of cell division produces new cells.
Science? Technology? Society? A runaway horse? cancer cell
Chapter III How Cells Produce Objects
The first section animal body structure level
Section II Structural Levels of Plants
In the third quarter, there is only one cell.
Chapter IV Microbial Viruses without Cell Structure
Science? Technology? Social prions, mad cow disease, creutzfeldt-Jakob disease
Unit 3 Green Plants in the Biosphere
Chapter 1 What green plants are there in the biosphere?
Section 1 Algae, Bryophytes and Ferns
Section 2 Seed Plants
Feelings endowed by biology and literature to plants
Chapter II Life of Angiosperms
Section 1 Seed Germination
Professional agricultural technicians and green certificates related to biology
Section 2 Plant Growth
Science? Technology? Social soilless culture
Section 3 Flowering and Fruiting
Professional beautician related to biology? gardener
Chapter III Water Cycle of Green Plants and Biosphere
Section 1 The life of green plants needs water
The second way to save water into plants
In the third section, green plants participate in the water cycle of biosphere.
Science? Technology? Social water-saving agriculture
Chapter IV Green plants are producers of organic matter in the biosphere.
Section 1 Green plants make organic matter through photosynthesis
Science? Technology? Social modernization greenhouse
Section 2 Utilization of Organic Matter by Green Plants
Chapter V Carbon and Oxygen Balance between Green Plants and Biosphere
Chapter VI Caring for Vegetation and Greening the Motherland
Science? Technology? Social rainforest, earth's? Lung?
Key points of biological knowledge in seventh grade
Biology and biosphere
▲ Biological characteristics: 1, biological life needs nutrition 2, bioenergy can breathe 3, bioenergy can excrete wastes generated in the body 4, bioenergy can respond to external stimuli 5, bioenergy can grow and reproduce 6, it is composed of cells (except viruses).
▲ General methods of investigation
Steps: Make clear the purpose of the investigation, determine the object of investigation, make a reasonable investigation plan, record the investigation, sort out the investigation results and write an investigation report.
▲ Classification of organisms
According to morphological structure: animals, plants and other organisms.
According to the living environment: terrestrial organisms and aquatic organisms.
By use: crops, poultry, livestock and pets.
▲ The biosphere is the home of all living things.
▲ Biosphere range: bottom of the atmosphere: birds, insects, bacteria, etc.
Most hydrosphere: the water layer within 0/50m from sea level/kloc-.
Lithospheric surface: belongs to all terrestrial creatures? Foothold?
▲ The biosphere provides basic conditions for living things: nutrients, sunlight, air and water, suitable temperature and a certain living space.
▲ The influence of environment on biology
Effects of abiotic factors on living things: light, moisture, temperature, etc.
▲ Experiment on the influence of light on the life of female rats P 15
▲ Inquiry process: 1, asking questions 2, making assumptions 3, making plans 4, implementing plans 5, drawing conclusions 6, expressing and communicating.
▲ control experiment P 15
▲ The influence of biological factors on biology:
The most common relationship is predation, but also competition and cooperation.
▲ Biological adaptation and its impact on the environment
Examples of biological adaptation to the environment P 19
Biological impact on the environment: plant transpiration can adjust air humidity, plant dead leaves and dead branches can adjust soil fertility, animal manure can improve soil, and earthworms can loosen soil.
▲ Concept of ecosystem: In a certain area, the unified whole formed by biology and environment is called ecosystem. A forest, a farmland, a grassland and a lake can all be regarded as an ecosystem.
▲ Composition of ecosystem:
Biological part: producer, consumer, decomposer
Abiotic parts: sunlight, water, air, temperature.
▲ If the organisms in every link of the ecosystem are weighed separately, under normal circumstances, the producer should be the one with a large number.
▲ Plants are producers of ecosystems, animals are consumers of ecosystems, and bacteria and fungi are decomposers of ecosystems.
▲ Food chain and food web:
The food chain begins with producers and ends with consumers, and is not preyed by other animals? The highest level? animal
▲ Material and energy flow along the food chain and food web.
The higher the trophic level, the less the biomass; The higher the trophic level, the accumulation (enrichment) of toxic substances along the food chain.
▲ The ecosystem has a certain ability of automatic adjustment.
Generally speaking, the number and proportion of organisms in the ecosystem are relatively stable. However, this automatic adjustment ability has a certain limit, beyond which it will be destroyed.
For example, in order to prevent birds from eating grass seeds, the experimental area is covered with nets. It turns out that the leaves of the grass in the net cover are almost eaten up by insects, and the grass grows well where there is no net cover. The reason is that the food chain is destroyed, which leads to the imbalance of the ecosystem.
▲ The biosphere is the largest ecosystem. Many impacts of human activities on the environment are global.
▲ Types of ecosystems p29
Forest ecosystem, grassland ecosystem, farmland ecosystem, marine ecosystem, urban ecosystem, etc.
▲ Biosphere is a unified whole p30
▲ Pay attention to the example on page 26 of DDT textbook.
▲ Page 27 of the textbook 1 Question Page 33 Biosphere 2
▲ Biological survival depends on the environment, adapting to the environment in various ways and influencing the environment.
Articles related to the biological catalogue in the first volume of the seventh grade:
1. PEP seventh grade biology textbook catalogue
2. PEP version of the seventh grade biology textbook directory
3. People's Education Edition, the first volume of the seventh grade biology textbook.
4. PEP seventh grade biology textbook catalogue
5. The seventh grade biology textbook catalogue