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Natural Selection & Selective Breeding

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Presentation on theme: "Natural Selection & Selective Breeding"— Presentation transcript:

1 Natural Selection & Selective Breeding

2 Natural selection is the process whereby the organisms that are best adapted to a particular environment will survive and reproduce.

3 Variation in traits (lots of variety in different organisms of the same species) give some individuals a competitive advantage. Natural Selection

4 These individuals have a competitive advantage
These individuals have a competitive advantage. Traits that contribute a competitive advantage become more common in a population. Natural Selection

5 Natural Selection

6 NATURE SELECTS

7 Natural selection depends on genetics and the environment

8 Some bugs are resistant to pesticides. They will survive and reproduce.

9 Darwin’s finches

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11 In natural selection, selection pressure is exerted by environmental factors

12 Natural selection leads to great diversity in nature

13 Selective breeding is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits by choosing which animal or plant will reproduce and have offspring together. HUMANS CHOOSE Selective breeding

14 In selective breeding, offspring keep the desired traits of parents

15 Selection pressure is exerted by …

16 Selective breeding doesn’t always increase the species chance of survival

17 Selective breeding can lead to the formation of a new speces in a much shorter time. Photo: 100 years difference

18 Supercow

19 Bullmastiff

20 Corn

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22 Both natural selection and selective breeding
Genetic material of an individual was inherited from individuals of the same species.

23 Both: Variations in traits

24 Both: It takes many generations for a change to emerge

25 Natural selection or selective breeding?

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