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"The Origin of Life on Earth" PPT courseware on the evolution of living things
There was no life on earth at first. So how did life on earth appear? How do humans explore the origin of life?
What did life evolve from?
Chemical evolution theory: It is believed that life occurred in the long evolution of the universe and is the product of the evolution of the universe to a certain stage.
Water vapor, hydrogen, ammonia, methane, carbon dioxide, hydrogen sulfide, etc., without oxygen.
think? Based on the experimental results of Miller and other scholars, what speculations can be made about the origin of life?
Answer: Based on the experimental results of Miller and other scholars, it can be inferred that 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.
Meteorites contain organic matter needed to form living organisms. What inferences can be made from this?
Answer: From the fact that meteorites contain organic matter required to constitute living organisms, it can be inferred that the organic matter constituting living organisms can be formed from outside the earth and brought to the earth.
The conditions provided by the primitive earth for the origin of life
(1) Place: primitive atmosphere and primitive ocean
(2) Substances: methane, ammonia, water vapor, hydrogen, hydrogen sulfide, etc.
(3) Energy: cosmic rays, ultraviolet rays, lightning, energy released by volcanic eruptions, etc.
practice
1. The primitive ocean is like a thin plate of hot soup. The constant interactions contained in it gradually formed life over extremely long periods of time.
2. Primitive life originated from matter.
4. There is a significant difference in composition between the original earth’s atmosphere and the current air. The composition of the atmosphere at that time was mainly ( )
A. Water vapor, ammonia, methane, etc.
B. Nitrogen, oxygen, water vapor, carbon dioxide, etc.
C. Oxygen, hydrogen, carbon dioxide, etc.
D. Water vapor, oxygen, nitrogen, etc.
5. On the surface of the primitive earth, the basic material of life that was first formed was ( )
A. Small molecular organic compounds
B. Macromolecule organic matter
C. Small molecule inorganic substances
D. Primitive life
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For more information about the PPT courseware "Evolution of Biology and the Origin of Life on Earth", please click the Evolution of Biology ppt and the Origin of Life on Earth ppt tag.
"The Origin of Life on Earth" Evolution of Biology PPT Courseware 6:
"The Origin of Life on Earth" PPT courseware on the evolution of living things 6 Please think about how long it took for the earth to come into existence? Was there life after the creation of the earth? Approximately how long ago did humans come into being? How did it come about? What were the earliest organisms on earth like?
"The Origin of Life on Earth" Evolution of Biology PPT Courseware 5:
"The Origin of Life on Earth" Biological Evolution PPT Courseware 5 Exploration Read several hypotheses about the origin of life and talk about which view you agree with more. View 1: Creationism This view holds that life was created by God or gods. Viewpoint 2: It happens naturally..
"The Origin of Life on Earth" Evolution of Biology PPT Courseware 4:
"The Origin of Life on Earth" Evolution of Biology PPT Courseware 4 The earth was born 4.6 billion years ago. Was there life on the earth at first? What were the earliest creatures? 1. Several hypotheses about the origin of life 1. Creationism 2. Spontaneity 3. Cosmonogenesis 4. Chemical evolution..