In a experimental invertebrate population the birth rate is 1200 per 1000 and death rate is 300 per 1000 per generation. Initial population size is 10000. What is value of NET reproductive rate?

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#Question id: 10239

#Section 1: Ecology

Two species of barnacle, balanus balanoides and Chthamalus stellatus, occur in the intertidal regions of Scotland. As following

 Which of the following statements is correct?

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#Question id: 11917

#Section 1: Ecology

Which one of the following  features of an early community?

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#Question id: 4654

#Section 2: Evolution

Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, these bones having developed from very similar embryonic tissues. How do biologists interpret these similarities?

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#Question id: 11517

#Section 2: Evolution

Which dispersion pattern is most common in nature?

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#Question id: 10862

#Section 2: Evolution

The fundamental niche of a species is