What are three types of Why are fossils important to scienti

What are three types of Why are fossils important to scientists? What are three types of evidence that support evolutionary theory? What is the role of natural selection in the process evolution? Explain the variations in the beaks of Darwin\'s finches and then importance. What is meant \"survival of the fittest\"? How does the environment

Solution

Ans 1. The preservation of fossils are known as fossilization which are further subdivided into five types,which are: 1) Insect preserved in amber, 2) Petrified wood (Premineralization), 3) Cast and mold of a calm shell 4) Pyritized ammonite and 5) Compression fossil of fern.

Ans 2. Fossils are the most valuable source of information available on earth which provide useful information about the Earths history. They tell us about the organisms which lived on the earth from the time of oldest fossils to till date. Scientists who want to learn about earth dig the fossils. Hence they are important for scientists. Most of the fossils are found in the layers of rock.

Ans 3. The types of evidences which support evolution theory are : 1) Fossil record 2) Geographic distribution of living species 3) Homologous structures of living organism 4) Embryology.

Ans 4. Evolution is a slow process where different species join the world and live together. Natural selection is how nature selects the fittest to survive. Natural selection determines the direction of evolution. If animal is mutated and its mutation is beneficial for itys survival then in such case the mutation would be inherited to the later generation. Natural selection would give a better condition for the animals to survive in the environment.

Ans 5. The variation was observed at galapagos island, the beaks of different species varied on different island. This variation in the beaks was due to the availability of food on that island. The finches which ate large nuts had strong beaks to break open the nuts whereas on the contrary the one who ate small nuts had beaks for cracking the nuts.This variation proved as vital feature for his theory of Natural selection.

Ans 6. Survival of the fittest is a phrase coined by charles darwin considering his theory of natural selection. As per the theory the one which is suitable to adapt to the environment are more likely to survive and produce progeny than the ones which adapt to lesser extent.