(g) from question No. 1 and 2. (a,b,c and d) 482 Laboratory Report 37 Evolution

Question

(g) from question No. 1 and

2. (a,b,c and d)

482 Laboratory Report 37 Evolution g. For a group of organisms to radiate, there must be niches (ways of making a living) available for the taking What made niches available for the radiation of mammals amphibians h. Extinction is a co mmon occurrence in the fossil record. Why do you think species become extinct? Examine the fossils available and complete the following table: Number Organismic Group Description Period Formed 3 4 5 10 2, EVIDENCE FROM VERTEBRATE EMBRYOLOGY a Do early chick and pig embryos have a similar structure and appearance? h Would you expect embryos of closely related species or distantly related species to have the greater similarity? Explain

Explanation / Answer

Ans-1 (g) mammals- mammals live on the earth upper surface so spread of radiation in air will radiate them.

Amphibian- the spread of radiation in water close to niche will help in radiation.

Ans-2 (a) in the embryo early stages of pigs and chicks, even of some other organisms have similar appearance.

Ans-2 (b) in early stages both will look similar but in later stages closely related will have more similarities as compared to greatly related.

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