"The Origin of Life" PPT download

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"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;

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Update Time: 2024-11-22

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

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