| Category | Format | Size |
|---|---|---|
| Beijing Normal University Edition Eighth Grade Biology Volume 2 | pptx | 6 MB |
"The Origin of Life" PPT download
Description
"The Origin of Life" PPT download
Part One: Hypotheses about the Origin of Life
Creationism
Life was created by God or God, and life always maintains the shape and structure it had when it was created, and remains unchanged.
"Carrion turns into fireflies" "Carrion grows maggots"
A once dry pond, once there is water
(No animals were visible in the water) Naturally tadpoles and frogs appeared.
spontaneous generation
Life can arise spontaneously from non-living matter at any time
Question: Did life occur naturally?
The origin of life PPT, part 2: derivation of the problem
Speculation: primitive earth
1. What was the environment like on the primitive earth?
2. How did the original atmosphere form in the first place?
3. Does the production of living matter require energy?
Earth environment: scorching sun, thunder and lightning, lava
Original atmosphere: ammonia, hydrogen, methane, water vapor
Primitive ocean: water vapor cools to form rainfall
Activity: How do you design a simulation experiment?
1. Where does energy come from?
2. How to simulate the primitive ocean?
3. How to simulate the original atmospheric composition?
The Origin of Life PPT, Part 3: Simulation Experiment
Think about it: How did Miller's simulation experiment work?
A simulates the original ocean
B simulates the original atmosphere
C simulate lightning
D simulated rainfall
Miller simulation experiment results
20 kinds of organic substances were obtained, 4 of the 11 kinds of amino acids are contained in biological proteins.
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.
"The Evolution of the Earth and the Origin of Life" PPT courseware:
"The Evolution of the Earth and the Origin of Life" PPT Courseware Part One: The Evolution of the Earth When the Earth was first born 4.6 billion years ago, did it look the same as it does now? 1. When the Earth was first born, it was a hot ball of molten lava. A fiery ball of magma. think..
"The Evolution of the Earth and the Origin of Life" PPT:
"The Evolution of the Earth and the Origin of Life" PPT Part One: The Evolution of the Earth The Earth was formed by the collapse and condensation of the original solar nebula. The age of the Earth is approximately 4.6 billion years. The solar system was born about 5 billion years ago. After about 500 million years, the earth began to take shape...
"The Origin of Life" PPT courseware:
"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 each new individual of a living thing is produced by the reproductive process of the previous generation of individuals.
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Update Time: 2024-07-02
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