"Scientific Development Talking about Cloning" PPT

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Hunan Education Edition 4th grade science volume 2, scientific development talks about cloning PPT

Part One: Definition of Cloning

Sun Dasheng in "Journey to the West" often plucks out a handful of vellus hairs in an emergency, and then blows on them, and the vellus hairs immediately turn into a group of Monkey King who are exactly like himself. This is of course a myth, but in today's scientific terms, it means that Sun Wukong can clone himself quickly.

1What is cloning?

2. What are the magical things about cloning?

3Will cloning benefit mankind?

We know that higher animals generally produce offspring through the combination of male and female reproductive cells. This kind of reproduction is called sexual reproduction. In other words, every animal has its own mother and father. If offspring are reproduced directly without the union of sexual cells, it is called asexual reproduction, also known as cloning.

Scientific development talks about cloning PPT, the second part of the content: cloning benefits mankind

As cloning technology develops, how does it benefit mankind?

Benefit mankind:

1. Cultivate high-quality, high-yielding grains and vegetables.

2. Cultivate high-quality livestock.

3. Save endangered species.

4. Cultivate human body “accessories”.

Cloning technology is a scientific and technological achievement that can benefit mankind.

People can use cloning technology to cultivate human skin for skin grafting operations; they can "manufacture" human "accessories" such as human ears, cartilage, livers, and hearts, and they can be "assembled" again once the patient needs them...

PPT on cloning on scientific development, part 3: Major events in cloning technology

1938: German scientists first proposed the idea of ​​cloning.

1952: Scientists begin cloning experiments with frogs.

1970: A breakthrough was achieved in the experiment of cloning frogs. The frog eggs developed into tadpoles, but died after starting to eat.

1981: Scientists conducted mouse cloning experiments and allegedly created normal mice using mouse embryonic cells.

1984: The first embryonic cloned sheep is born.

February 24, 1997: The Roslin Institute in the UK announced the successful breeding of cloned sheep. Scientists have successfully created a cloned sheep using mammary gland cells taken from a 6-year-old adult sheep.

Scientific development talks about cloning PPT, the fourth part: expansion

If I could clone

Require:

1. Ideas should be fantastic.

2. Ideas should be beneficial to mankind.

Keywords: Free download of science PPT for the second volume of the fourth grade of Hunan Education Edition, clone PPT download of scientific development, .PPT format;

For more information about the PPT courseware "Cloning on Scientific Development", please click on the Clone ppt tag on Scientific Development.

"Scientific Development: Cloning" PPT courseware:

Hunan Education Edition fourth-grade science, second volume science, scientific development talks about cloning PPT courseware, the first part content: Understanding cloning, students, do you understand cloning? Cloning is the transliteration of English clone or cloning, and English clone originates from the Greek Klone, the original meaning Refers to seedlings...

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Update Time: 2024-09-07

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