Competition for light,nutrients,and space is most severe between:

  • A
    Closely related organisms growing in different niches.
  • B
    Closely related organisms growing in the same area/niche.
  • C
    Distantly related organisms growing in the same habitat.
  • D
    Distantly related organisms growing in different niches.

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$A$ scorpion stalks,kills,and then eats a spider. Based on its behavior,which ecological terms describe the scorpion?

Which of the following represents the correct pair of organisms and their type of interaction?

Territoriality occurs as a result of

Fill in the blanks:
Species $A$ Species $B$ Type of Interaction Example
$+$ $-$ $(a)$ $(b)$
$+$ $+$ $(c)$ $(d)$
$+$ $(e)$ Commensalism $(f)$

Commensalism is the interaction in which

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