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Divergent Evolution

Formation of ...

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Formation of one or more spaces from an ancestor species is what speciation

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Adaptive radiation definition: evolution of a number of divergent species from a common ancestor

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Q. Speciation is the formation of one or more new species from an existing species. A new species or organism is formed when

Q. What is meant by "speciation"? State the various factors which could lead to the formation of new species.

Q. Match the following.

	List I		List II
A	It is the formation of new species from an existing one due to reproductive isolation of a section of its population. Speciation is of two types, .........................	1	Reproductive isolation
B	and .................... speciation is the formation of new species from populations occurring in different and mutually exclusive areas of distribution.	2	Microevolution
C	Sympatric speciation is the development of new species from a segment of the population in the same area due to some intrinsic factors like mutations. ...................... is different from both microevolution and macroevolution.	3	Allopatric
D	..................... is the formation of new variants due to gene mutation and gene recombination, e.g., pesticide resistance, high temperature.	4	Sympatric
E	....................... is the development of different genera and higher taxa.	5	Speciation
F	For speciation to occur, the ................ of a section of the population should separate from the rest, resulting in stoppage of gene flow and accumulation of variations, some of which do not allow it to interbreed with the parent population.	6	Macroevolution
G	The inability of individuals of two populations to interbreed due to differences in morphology of reproductive organs, behavior, mating times and physiological incompatibility is called .......................	7	Gene pool

Q. What is speciation? What are the factors of speciation? Will geographical barrier is a major factor in speciation of a self-pollinating plant species?

Q. Those species originated from common ancestor show more conserved sequence in genetic material than those of unrelated species.

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