What is the size of the human population today?

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#Question id: 12376

#Section 1: Ecology

All of the following may be considered as sites for secondary succession EXCEPT

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#Question id: 7700

#Section 2: Evolution

The legless condition that is observed in several groups of extant reptiles is the result of ________.

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#Question id: 12148

#Section 1: Ecology

If asked to find the cause of regular fluctuations in a population's size not associated with seasonal environmental variation, you would probably first seek evidence for: 

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#Question id: 12372

#Section 1: Ecology

In a particular case of secondary succession, three species of wild grass all invaded a field. By the second season, a  single species dominated the field. A possible factor in this secondary succession was

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#Question id: 10601

#Section 2: Evolution

following some statement are given about Grime’s triangle that is alternative to r and K selection is correct?

A. Ruderals are adapted to take advantage of habitat disturbance, but these are less competitor 

B. Any species cannot be a good stress tolerator and a good competitor at the same time

C. Mangroves and lichens are good stress tolerant and also good adopted to disturbance

D. Many perennial herbs are good adapted to habitat disturbance, but these are less competitor 

Which one of the following options represents a combination of correct statements?