1. Late stage succession communities typically: a) contain more equilibrial than

Question

1. Late stage succession communities typically: a) contain more equilibrial than opportunistic species b) are more diverse than disturbed communities c) are more diverse than early stage succession commmunities d) contain more opportunistic species than equilibrial species e) suffer higher rates of disturbance

2. Phenotypic plasticity is when: a) Organisms adapt their genotype to the local environment b) Individuals with different phenotypes show plasticity in their size c) Organisms with different genotype express different phenotypes in the same environment d) Plasticity in the environment causes different genotypes to survive leading to different phenotypes e) Organisms express different phenotypes depending on the local environment but have the same genotype

3.  Terrestrial areas that are saturated with water, either permanently or seasonally, are typically known as what type of ecosystem. f) Grasslands g) Heathlands h) Litholands i) Wetlands j) Littoral

4.  Briefly explain two ways that excess climate gas emissions are changing the world’s physical environment

Explanation / Answer

1,c.An opportunistic species is a species with a low level of specialisation that is either capable of adapting to varied living conditions, or that gives priority to reproduction over survival. Whereas A species in which competitive ability rather than dispersal ability or reproductive rate, is the chief survival strategy: competition is the typical response to stable environmental resources.

2.e.Phenotypic plasticity refers to the changes in an organism's behavior, morphology and physiology due to its adaption to a unique environment.

3.i .A wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem.

4.i. Global warming- continuous emissions of gases like carbon dioxide and other green house gases causes average temperature of our earth to increase leading to global warming.It leads to the following effects-

ii.Air pollution occurs mainly due to the emission of gases which is the cause of many plant and human diseases. It also leads to plant deterioration in long course.

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