"The Process of Biological Evolution" Biological Evolution PPT Courseware 5

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"The Process of Biological Evolution" Biological Evolution PPT Courseware 5

The process of biological evolution

Like the origin of primitive life, the process of biological evolution is also an extremely long process. The rich and colorful biological world on the earth today evolved gradually over a long period of time.

In the early stages of evolution, due to differences in nutritional methods, part of the primitive life evolved into primitive algae with chlorophyll, and the other part evolved into primitive single-celled animals without chlorophyll. Later, these two types of primitive organisms developed into the animal kingdom and the plant kingdom respectively along a certain process. In the process of studying biological evolution, scientists compare the biological evolution of different groups, compare the structures, functions and living habits of different groups of organisms, and discover the similar and different characteristics of various types of organisms. Generally speaking, biological groups that are closely related have more similar characteristics, and vice versa. Based on analysis and comparison, find out the relationship between different groups of organisms and the order of evolutionary development. We can also use this method to analyze and compare different groups of plants and animals to understand their evolutionary processes.

The evolution of plants from lower to higher levels (1)

Prokaryotes are a type of very small organisms that can mostly be seen under a microscope. They are composed of prokaryotic cells, including bacteria, actinomycetes, rickettsiae, etc. Most of them have no pigment and have motile cilia or flagella on their surface. They live in a wide range of rocks, soil, water and air. Some of them can decompose the remains of animals and plants into nutrients that can be directly used by plants, some survive in animals and plants, some coexist with plants for mutual benefit, and some bring diseases to animals and plants. They are a group of organisms that are both beneficial and harmful.

The evolution of plants from lower to higher levels (2)

There are about ten thousand species of fungi and plants on the earth, distributed in the air, soil, water, animals and plants, and their debris. They use readily available organic matter as nutrients and live saprophytic, parasitic, and symbiotic lives. (Common ones include shiitake mushrooms, enoki mushrooms, mushrooms, etc.).

The evolution of plants from lower to higher levels (3)

There are about 26,000 known species of lichen. Lichen is a symbiosis of bacteria and algae. The algae use photosynthesis to produce nutrients, and the fungi absorb water and nutrients, forming a mutually beneficial symbiosis. Most lichens grow very slowly, taking several years to reach a few centimeters. They are very capable of living. Lichens on rocks go dormant during droughts and revive and grow after rain. Lichens in forests are often together with bryophytes. , attached to the bark and dead branches, blowing in the wind. (Dijuan, Shi Er, Plum Clothes, etc.)

what is a fossil

Fossils are the remains of dead animals or plants that have not decayed over a long period of time and become part of the earth's crust after a few years. The organism itself is well preserved, either as an impression in sedimentary rocks, or as traces of its existence (called trace fossils). Fossils, usually dead animals and plants, are quickly buried in watery sediments, causing chemical reactions, and then minerals are added or organisms are excreted. If this procedure did not occur, the organism would be temporarily preserved but would not become a fossil.

Fossil collecting is a fascinating hobby, and in recent decades more and more people have taken up the activity. Its fascinating feature is that collectors can not only enjoy the excitement of discovering fossils, but also master the operational skills of collecting and preparing specimens, while also having the academic challenge of identifying fossil finds. Few other sciences allow the novice to make such an important contribution to the knowledge of prehistory as fossil collecting.

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For more information about the PPT courseware "Evolution of Biology and the Process of Biological Evolution", please click on the Evolution of Biology ppt Process of Biological Evolution ppt tag.

"The Process of Biological Evolution" PPT:

"The Process of Biological Evolution" PPT Part One Content: Situation Introduction Information: At the beginning of the birth of life, there were only the simplest single-celled organisms on the earth. Today's earth is full of rich and colorful creatures. So where did today's living things come from? until..

"The Process of Biological Evolution" Biological Evolution PPT Courseware 4:

"The Process of Biological Evolution" Biological Evolution PPT Courseware 4 How did the colorful biological world evolve and develop? What is the evidence of biological evolution? Fossils are direct evidence of biological evolution. What are fossils? (Reading a book) Evidence of biological evolution: 1..

"The Process of Biological Evolution" Biological Evolution PPT Courseware 3:

"The Process of Biological Evolution" Biological Evolution PPT Courseware 3 Biology on the earth is diverse. How did life on the earth come about? The theory of chemical origin points out that life on the earth can gradually evolve from non-living substances through a long chemical pathway. become primitive life. ..

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Update Time: 2024-11-22

This template belongs to biology courseware People's Education Edition Biology for Grade 8, Volume 2 industry PPT template

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