Beijing Normal University Edition Seventh Grade Biology Volume 1

Description

"Various Creatures" PPT

Part One: The Biosphere

The area of ​​life on earth and its living environment as a whole.

Including the lower layer of the atmosphere, the entire hydrosphere and the upper layer of the lithosphere.

biological diversity

species diversity

Activity: Exchange information on species diversity

Try writing down the names of creatures you are familiar with on paper, and discuss them in the group. Eliminate duplicates and count the number of creatures listed in the group.

Communicate the statistical results of each group in the class, and then count how many new ones have been added and how many types of organisms are listed in total.

Discussion: Why are living things so diverse?

genetic diversity

genetic diversity also known as genetic diversity

ecosystem diversity

Living in a certain environment, organisms and the environment influence and interact with each other to form an ecosystem.

biosphere

terrestrial ecosystem

wetland ecosystem

marine ecosystem

Various biological PPT, part 2 content: classroom training

1. Which of the following statements about the biosphere is incorrect:

A. The biosphere is composed of the lower layer of the atmosphere, the entire hydrosphere, and the upper layer of the lithosphere.

B. Composed of all living things and the environment that sustains their life.

C. It is composed of air, water, sunlight and other conditions that maintain biological life.

D. Within the range of approximately 11,000 meters below the water level and 10,000 meters above the water level.

2. Biodiversity refers to:

A. Species diversity B. Genetic diversity

C. Diversity of ecosystems D. All of the above

3. There are now 20,000 to 25,000 varieties of chrysanthemums in the world, which reflects the biological characteristics:

A. Species diversity B. Genetic diversity

C. Diversity of ecosystem D. Diversity of ecological environment

All kinds of biological PPT, the third part: characteristics of living things

Irritability

grow

reproduce

Metabolism

① Metabolism is the basic characteristic of living things, which runs throughout the life of living things. It is a symbol of life and the essential difference between living things and non-living things.

② The stress, growth, and reproduction of organisms are all based on metabolism.

③ Organisms must exchange materials with the external environment during metabolism.

Various biological PPT, part 4 content: classroom exercises

What life phenomena does the following information indicate about organisms?

There is a kind of "extreme rain flower" growing in Australia and New Zealand. Its petals are very sensitive to humidity. When the air humidity increases to a certain level, the petals shrink and wrap up the stamens, indicating that it is going to rain; when the petals unfold, it means it will rain. It predicts that it will not rain. There is a Green Gang tree in Guangxi, my country. When the weather is sunny, the leaves are dark green. When it rains, the leaves turn from green to red. There are also plants that can indicate air pollution levels.

Answer: Living things can respond to stimuli.

Discussion In addition to the characteristics of living things that we already know, what other characteristics do living things have?

Able to breathe;

Can eliminate waste products produced in the body;

There are heredity and variation;

capable of illness, aging, and death;

Able to adapt to and influence the environment;

Have a strict and orderly structure;

Keywords: Beijing Normal University version of the seventh grade biology PPT courseware for free download, various biology PPT downloads, .PPT format;

For more information about the PPT courseware "The World of Life and Various Creatures", please click the "The World of Life and Various Creatures" ppt tag.

"Various Creatures" PPT courseware:

The first part of the PPT courseware "All Kinds of Creatures": Situation introduction There are many kinds of creatures, from young grass to towering trees, from fish in the water to birds in the sky, from tiny creatures invisible to the naked eye to huge creatures in the ocean. Blue whales, from cultivated crops to tame...

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Update Time: 2024-08-09

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