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E-education edition sixth grade science volume 2	pptx	6 MB

"Who Can Survive" PPT Courseware 2

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Upload Time: 2024-10-10

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"Who Can Survive" PPT Courseware 2

The mystery of biological survival

Life has existed on the earth for about 3 billion years. During this long process, many species have flourished and many others have become extinct. So what is the root cause of this wonderful phenomenon?

ground finch

Read the information and answer questions

What is the difference between the beaks of the two ground finches?

Why can some ground finches survive and some cannot?

summary:

Due to changes in the environment, the ground finches that can adapt to the changes will survive, while the ground finches that cannot adapt to the changes will become extinct.

Darwin and his evolutionary ideas

Darwin was born in England. Due to the influence of his family environment, he liked collecting minerals, plants and insect specimens since he was a child.

Darwin often went to the beach to learn from people to collect biological specimens, dissect, classify and make observation records of animals.

At the age of 22, Darwin boarded the expedition ship "Beagle" as a naturalist and went on a five-year global scientific expedition with the ship.

Winged and rudimentary insects

On an island where strong winds often blow, there are many wingless or wingless insects (see the picture above). Please analyze why there are so many wingless insects on this island?

Keywords: Who Can Survive Teaching Courseware, Download the Science PPT Courseware for the Second Volume of the Sixth Grade in the E-education Edition, Download the Sixth Grade Science Slide Courseware, Download the PPT Courseware Who Can Survive, .PPT format;

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"Who Can Survive" PPT courseware:

"Who Can Survive" PPT Courseware Small Experiment Use pliers and tweezers to peel broad beans. Peeling a broad bean means that the ground sparrow has eaten a seed. One minute to see who peels off the most. Darwin (1809~1882), British biologist. In 1831, he sailed aboard the naval exploration ship Berger..

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Update Time: 2024-10-10

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"Who Can Survive" PPT Courseware 2