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What is sympatric speciation example?

Important Questions on Heredity and Evolution

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A bird species X is restricted to Narcondam island (NI) in Andaman and bird species Y is restricted to Middle Andaman Islands (MAI). NI has an area of 8 km2 and MAI has an area of 1500 km2. Based on the fossil record, a researcher found a common ancestor of species X and Y in Myanmar, which had a long and pointed beak. Almost all members of the population of species X have a long and pointed beak that is specialized to feed larvae of the beetle Wallace, found only on coconut trees in NI. Most population of species Y either have a very short and blunt beak to break open nuts or long and blunt beak to feed on small lizards. Very rarely members of species Y are found with long pointed beaks. Given this scenario, choose the correct statement from the following.
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Mention the factors that could lead to the rise of a new species.

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Science>Biology>Heredity and Evolution>Speciation
Discuss the role of different patterns, of selections in evolution.
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Science>Biology>Heredity and Evolution>Speciation
The largest unit in which gene flow is possible is;
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Science>Biology>Heredity and Evolution>Speciation

Study the following and pick up the correct combinations:

S.NO List -1 List-2 List -3
I. Anagenesis Divergent evolution One species diverges into two or more species
II. Cladogenesis Phyletic evolution Evolution of a new species in single lineage
III. Gradualism Charles Lyell Earth has changed slowly through ages
IV. Biogenesis Louis Pasteur Living organisms originate from preexisting forms
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Science>Biology>Heredity and Evolution>Speciation
Population are said to be sympatric when-
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Science>Biology>Heredity and Evolution>Speciation
Define 'Species'. What are the important factors leading to the rise of a new species?
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Science>Biology>Heredity and Evolution>Speciation
What would you understand by geographical isolation? Will this be a major factor in the speciation of a self-pollinating plant species? Why or why not?
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Science>Biology>Heredity and Evolution>Speciation
The bill sizes in a bird species of seed crackers from West Africa shows a bimodal distribution. Their most abundant food sources are two types of marsh plants that produce hard and soft seeds, consumed preferentially by the large and small billed birds, respectively. This bimodal distribution of bill sizes is a likely consequence of
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Science>Biology>Heredity and Evolution>Speciation
During the course of evolution, the process by which the characteristic features of the members of a species modify due to the influence of various factors and thus give rise to the organisms with new characteristic features is called
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Science>Biology>Heredity and Evolution>Speciation
In a species, the weight of the newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 and 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place?
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Science>Biology>Heredity and Evolution>Speciation
In a population of plants, some were extremely tall and the remaining were extremely dwarf. No plants of the population showed intermediate height. The type of operation of natural selection in the above case is
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Science>Biology>Heredity and Evolution>Speciation
Artificial selection to obtain cows yielding higher milk output represents
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Science>Biology>Heredity and Evolution>Speciation

Define ‘speciation’. Explain how speciation occurs.

Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Give reason for your answer.

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Science>Biology>Heredity and Evolution>Speciation
What are the factors that result in the formation of a new species?
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Science>Biology>Heredity and Evolution>Speciation
What are the characteristics of formation of new species.
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Science>Biology>Heredity and Evolution>Speciation

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

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Science>Biology>Heredity and Evolution>Speciation
Disruptive selection favours
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Science>Biology>Heredity and Evolution>Speciation
Give a few examples of speciation.
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Science>Biology>Heredity and Evolution>Speciation
When selection acts to eliminate both extremes from an array of phenotypes, the frequency of intermediate type, which is already present in more, gets increased. This type of selection is called