1-In which one of the following geographic locations is the climax community cha

Question

1-In which one of the following geographic locations is the climax community characterized by the presence of large slow-growing deciduous trees? A) western United States B) midwestern United States C) southwestern United States D) Arctic E) northeastern United States 2-Which one of the following statements accurately reflects the nature of climax communities? A) Climax communities are the most efficient in terms of energy utilization and exhibit the greatest species diversity. B) Climax communities develop very quickly. C) Climax communities are so well established that when disturbed, they quickly recover. D) Climax communities have more consumers than producers, because the producers are so efficient. E) Succession begins once a climax community has been established. 3-Which one of the following statements is TRUE regarding the nitrogen cycle? A) Plants rely on animals for their source of usable nitrogen. B) In a balanced ecosystem, denitrification occurs more often than nitrogen fixation. C) Atmospheric nitrogen cannot be used by living organisms because two nitrogen atoms are held tightly together by a triple covalent bond. D) Nitrogen fixation results in the production of nitrogen from carbon. E) Once nitrogen is "fixed," it must then be converted to nitrogen gas before it can be used by living organisms. 30) The evolution of eukaryotic cells began approximately_ years ago. A) 1.7 billion million E) 3.8 billion B) 4.6 billion C) 10 million D) 1

Explanation / Answer

1) 4th option is right because in northeastern united state the climex community is dominated by the large deciduous tree. where as the southeasten united state is dominated by pine and oak tree etc.

2) A option is correct because climex community efficiently utilizae all the energy and shows much greater species diversity .It is a very long time process where consumers and producers are equal to maintain the ecosystem.

3) 'C' option is TRUE: atmospheric nitrogen can not be used by living organism because the two nitrogen atom held together by 3 bond.

4) 1 million

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