What is a key stone species ?

A rare species that has minimal impact on biomass and on other species in community

A dominant species that constitutes a large proportion of biomass, which affects many other species

A common species that has plenty of biomass, yet has a fairly low impact on the community's organization

A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival

Solution

A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival

Key stone species is a apecies which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival.

Eg, Elephants damage trees by browsing the lower branches, stripping the bark and uprooting them. It prevents the forest from encroaching on the grasslands, where grazing beasts flourish.

Some More Questions From Evolution Chapter

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Evolution

Some More Questions From Evolution Chapter

What is meant by the term fossil ?

What is the type of evolution in which the same structure developed along different directions due to adaptations to different needs ?

Name the different eras of geologic time scale.

What is single step large mutation?

Consider a thorn in Bougainvillea and a tendril in cucurbita. Are these two organs homologous or analogous ? Give reason.

Give two examples that represent adaptive radiation.

Which theory attempts to explain to us the origin of universe?

Evolution is a discontinuous process. Is it correct ?

Give the three key factors of the modern concept of evolution.

Which other term can be used for natural selection ?

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