QUESTIONS

Two species may interact in a variety of different ways. The interactions may be positive, negative or simply neutral to the organisms involved.  
(i) Complete the table below which summarises some interactions  
     
Interaction Effect on species 1 Effect on species 2 Explanation
Predation + - Species 1 kills and eats species 2
Parasitism
Mutualism

(4)

(ii) Explain why intraspecific competition may be described as a density-dependent factor affecting population growth

(2)

 

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