"The Origin of Life" PPT courseware

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"The Origin of Life" PPT courseware

Part One: Scenario Introduction

The living creatures existing on the earth are diverse and colorful. Through the biological knowledge we learned before, we understand that every new individual of a living thing is produced by the reproductive process of the previous generation of individuals. So where did the first living things come from? How did the first living thing form?

learning target

1. Briefly describe several main views on the origin of life.

2. Describe the general process of chemical evolution accepted by most scholars.

The Origin of Life PPT, Part 2: Learning New Knowledge

1. Does life occur naturally?

The theory of abiogenesis holds that life arises naturally from inanimate matter. For example, in ancient my country, it was believed that "rotten grass turns into firewood", "rotten flesh grows maggots", etc. In the West, Aristotle was a natural generation theorist. He believed that rats developed from mud and rubble.

Biogenesis theory holds that life can only come from life, and non-living matter can never produce new life at any time.

2. Is chemical evolution possible?

Was there life on Earth in the first place?

How did the most primitive life appear?

What were the creatures on Earth like hundreds of millions or billions of years ago?

The Origin of Life PPT, Part 3: Discussion of Issues

discuss

1. How old is the earth?

2. What were the environmental conditions of the primitive earth?

3. Components of the original atmosphere: water vapor, hydrogen, ammonia, methane, etc.

The most obvious difference from the composition of the current atmosphere: no oxygen

4. Do you think life existed on the primitive earth? Please give your reasons.

Based on the experimental results of Miller and other scholars, what inferences can be made about the origin of life?

Although life could not be formed on the primitive earth, organic matter that constituted living organisms could be produced. Therefore, the origin of life from inorganic matter to organic matter is completely achievable.

The Origin of Life PPT, Part 4: Learning Detection

1. Among the following speculations, which one do you think lacks experimental evidence? ( )

A. Humans originated from forest apes

B. Life originated in the primitive ocean

C. Life originated in extraterrestrial space

D. God created man

2. Scientists speculate that the primitive atmosphere was formed under the long-term effects of high temperature, ultraviolet rays, lightning and other natural conditions ( )

A.Protein

B. Primitive life

C. Simple organic matter

D. Single-celled life

3. The newly formed primitive earth ( )

A. Similar to now

B.The temperature is very high

C.The temperature is very low

D.The temperature is suitable

Keywords: Beijing Normal University Edition Biology PPT courseware for eighth grade volume 2 free download, Origin of Life PPT download, .PPT format;

For more information about "The Occurrence and Development of Life, The Origin of Life" PPT courseware, please click on the Occurrence and Development of Life PPT, The Origin of Life PPT tag.

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Update Time: 2024-10-02

This template belongs to biology courseware Beijing Normal University Edition Eighth Grade Biology Volume 2 industry PPT template

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