MHT CET · BIOLOGY · STD 12 - 13. Organisms and Populations

Identify the correct types of ecological interactions represented by P, Q, R and S.
Interaction between Type ofinteraction
Species A Species B
+ - P
- - Q
+ 0 R
- 0 S

A P-Commensalism; Q-Amensalism; R-Parasitism; S-Competition
B P-Parasitism; Q-Competition; R-Amensalism; S-Commensalism
C P-Parasitism; Q-Competition; R-Commensalism; S-Amensalism
D P-Predation; Q-Amensalism; R-Commensalism; S-Parasitism

Verified Solution

Answer & Solution

Correct Answer

(C) P-Parasitism; Q-Competition; R-Commensalism; S-Amensalism

Step-by-step Solution

Detailed explanation

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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	Column I		Column II
i.	American	a.	Langshan
ii.	Asiatic	b.	Plymouth Rock
iii.	Mediterranean	c.	Minorca
iv.	English	d.	Australorp

Interaction between		Type ofinteraction
Species A	Species B	Type ofinteraction
+	-	P
-	-	Q
+	0	R
-	0	S

Identify the correct types of ecological interactions represented by P, Q, R and S.Interaction between Type ofinteractionSpecies ASpecies B+-P--Q+0R-0S

Step-by-step Solution

Identify the correct types of ecological interactions represented by P, Q, R and S.
Interaction between Type ofinteraction
Species A Species B
+ - P
- - Q
+ 0 R
- 0 S