Question:
Choose the correct statements regarding population interactions between two species.
A. In both parasitism and commensalism, only one species benefits and the other species is harmed.
B. Both species benefit in mutualism.
C. Both species benefit in commensalism.
D. In parasitism, only one species benefits and the other species is harmed.
E. In amensalism, one species is harmed and the other is unaffected.
Choose the correct answer from the options given below :
Choose the correct statements regarding population interactions between two species.
A. In both parasitism and commensalism, only one species benefits and the other species is harmed.
B. Both species benefit in mutualism.
C. Both species benefit in commensalism.
D. In parasitism, only one species benefits and the other species is harmed.
E. In amensalism, one species is harmed and the other is unaffected.
Choose the correct answer from the options given below :
A. In both parasitism and commensalism, only one species benefits and the other species is harmed.
B. Both species benefit in mutualism.
C. Both species benefit in commensalism.
D. In parasitism, only one species benefits and the other species is harmed.
E. In amensalism, one species is harmed and the other is unaffected.
Choose the correct answer from the options given below :
Show Hint
Logic Tip: Master the basic symbols:
Mutualism: (+, +)
Commensalism: (+, 0)
Amensalism: (-, 0)
Parasitism/Predation: (+, -)
Competition: (-, -)
Updated On: May 3, 2026
- B and E only
- B, D and E only
- A and B only
- A and D only
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Concept:
In an ecosystem, interacting species can have positive (+), negative (-), or neutral (0) effects on each other. These population interactions are strictly categorized based on the combination of these outcomes for the two interacting species.
Step 1:
Parasitism is a (+, -) interaction, where the parasite benefits and the host is harmed. However, commensalism is a (+, 0) interaction, where one species benefits and the other is neither harmed nor benefited. Therefore, stating that the other species is harmed in commensalism is false. Statement A is incorrect.
Step 2:
Mutualism is a (+, +) interaction. An excellent example is a lichen (fungus and algae). In this relationship, both species benefit mutually from the association. Statement B is correct.
Step 3:
As noted in Step 1, commensalism is a (+, 0) interaction. Only one species benefits, while the other is completely unaffected (neutral). Saying both species benefit describes mutualism, not commensalism. Statement C is incorrect.
Step 4:
Parasitism is defined as a (+, -) relationship. The parasite derives nutrition or shelter (benefit), while the host suffers a loss of fitness or damage (harm). Statement D is correct.
Step 5:
Amensalism is a (-, 0) interaction. In this specific dynamic, one species is harmed (usually by chemical inhibition, like Penicillium fungus killing bacteria), while the other species is completely unaffected (the fungus gains no immediate direct benefit or harm from the dead bacteria). Statement E is correct.
Step 6:
The factually correct statements describing population interactions are B, D, and E. This makes Option (2) the right choice.
In an ecosystem, interacting species can have positive (+), negative (-), or neutral (0) effects on each other. These population interactions are strictly categorized based on the combination of these outcomes for the two interacting species.
Step 1:
Parasitism is a (+, -) interaction, where the parasite benefits and the host is harmed. However, commensalism is a (+, 0) interaction, where one species benefits and the other is neither harmed nor benefited. Therefore, stating that the other species is harmed in commensalism is false. Statement A is incorrect.
Step 2:
Mutualism is a (+, +) interaction. An excellent example is a lichen (fungus and algae). In this relationship, both species benefit mutually from the association. Statement B is correct.
Step 3:
As noted in Step 1, commensalism is a (+, 0) interaction. Only one species benefits, while the other is completely unaffected (neutral). Saying both species benefit describes mutualism, not commensalism. Statement C is incorrect.
Step 4:
Parasitism is defined as a (+, -) relationship. The parasite derives nutrition or shelter (benefit), while the host suffers a loss of fitness or damage (harm). Statement D is correct.
Step 5:
Amensalism is a (-, 0) interaction. In this specific dynamic, one species is harmed (usually by chemical inhibition, like Penicillium fungus killing bacteria), while the other species is completely unaffected (the fungus gains no immediate direct benefit or harm from the dead bacteria). Statement E is correct.
Step 6:
The factually correct statements describing population interactions are B, D, and E. This makes Option (2) the right choice.
Was this answer helpful?
0
0
Top NEET Biology Questions
- Chordae tendineae are found in
- Glycolysis takes place in
- All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?
- All vertebrates are chordates but all chordates are not vertebrates, why ?
- The blood calcium level is lowered by the deficiency of
View More Questions
Top NEET Human Reproduction Questions
- The body of the ovule is fused within the funicle at :
- The first menstruation is called:
- Consider the following:
A. The reductive division for human female gametogenesis starts earlier than that of male gametogenesis.
B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females.
C. The first polar body is associated with the formation of the primary oocyte.
D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding. - \begin{table}[h] \centering \begin{tabular}{|c|l|c|l|} \hline \multicolumn{2}{|c|}{List I} & \multicolumn{2}{c|}{List II}
\hline A & Cortisol & I & Stimulates the formation of alveoli in mammary glands
B & Aldosterone & II & Produces anti-inflammatory reactions
C & Cholecystokinin & III & Stimulates reabsorption of $Na^+$ and water from renal tubule
D & Progesterone & IV & Stimulates secretion of pancreatic enzymes and bile juice
\hline \end{tabular} \end{table}Choose the correct answer from the options given below :}
Top NEET Questions
- A coil of inductive reactance $31\, \Omega$ has a resistance of 8 $\Omega$. It is placed in series with a condenser of capacitative reactance $25 \,\Omega$. The combination is connected to an a.c. source of 110 V. The power factor of the circuit is :-
- A liquid compound (x) can be purified by steam distillation only if it is
- In an a.c. circuit with phase voltage V and current I, the power dissipated is
- A bubble in glass slab $ (\mu = 1.5) $ when viewed from one side appears at 5 cm and 2 cm from other side, then thickness of slab is
- A bulb is located on a wall. Its image is to be obtained on a parallel wall with the help of convex lens. If the distance between parallel walls is 'd' then required focal length of lens placed in between the walls is : -
View More Questions