Question

1) Explain the theory of natural selection.

2) Who came up with this theory?

3) How do plants and animals adapt to survive? Give some examples.

4) Why was cyanobacteria important to evolution and great ecological changes?

Answer 1

1natural selection is the process in which the new new more generation are evolved from the previous generation

Answer 2

1)The theory of natural selection emphasised the notion of survival of the fittest. In heredity we can observe that organisms with a advantageous variation have a better chance of survival than other organisms of the same species.

2)Charles Darwin came up with this theory

3)Most animals and plants undergo sexual reproduction, which means that a lot of variations will be introduced in the genes of the offspring organism. This means that they might have a better chance of survival in their ecological niche. Then, if by chance a natural disaster strikes, then the ones with an advantageous variation will survive and continue the species, passing down the variation to future generations.

4)Cyanobacteria were organisms that possessed the ability to photosynthesise. Many organisms do not have this. They were one of the first organisms with this ability and started acted as producers in their food chains, and thus changed the food dynamic in the ecosystem.

Hope this helps!

Sorry for the long answer..