QBManager

Organisms and Populations

231177 Amensalism can be represented as:

1 Species A (+); Species B (0)

2 Species A (-); Species B (0)

3 Species A (+); Species B (+)

4 Species A (-); Species B (-)

Explanation:

Amensalism is an interaction between two organism of different species.
- In which one species certain inhibits the growth of other species of secreting certain chemicals.
- The first species is neither get benefited nor harmed.
- $(+) : (0)$ interactin is observed in commensalism.
- $(+) : (+)$ interactin is observed in mutualism.
$∙ (-) : (-)$ interactin is observed in competition.

NEET-2021

Organisms and Populations

231179 While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (-) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one specifies and (-) for another specifies involved in the interaction?

1 Competition

2 Predation

3 Amensalim

4 Commensalism

Explanation:

Predation:- Predation is the interaction between prey and a predators where the energy flows from one organism to the other organisms called prey predator are denoted by $(+, -)$
Competition:- Competition occurs when closely related species complete for the same resources that are limiting. It show usually $(-, -)$
Amensalim:- The relationship between organism from which one organism is negatively affected and the other organism is unaffected is termed as Amensalism. It's denoted by $(-, 0)$
Commensalism:- This is the interaction in which one species benefits and the other is neither harmed non benefited.
It is denoted as $(+, 0)$ .

NEET-2022

Organisms and Populations

231187 Match column I with column II and select the correct option from the codes given below :
| Column I | Column II |
|----|----|
| A. Commensalism | (i) One inhibited, other unaffected |
| B. Parasitism | (ii) One benefitted, other unaffected |
| C. Mutualism | (iii) Both are benefitted |
| D. Amensalism | (iv) One benefitted, other harmed |

1

A -

(iv),

B

- (ii),

C

- (iii),

D

- (i)

2

A -

(iii),

B -

(iv),

C -

(ii),

D -

(i)

3

A -

(ii),

B

- (iv),

C -

(iii),

D -

(i)

4

A -

(ii),

B

- (iv),

C -

(i),

D -

(iii)

Explanation:

Commensalism- where one species benefits while
other is unaffected $(+, 0)$ .
Example- A bird making a nest in a tree.
Parasitism - One species benefits while one is harmed
$(+, -)$ .
Example- Lice
Mutualism- Both species benefit $(+, +)$ Ex. Lichen.
Amensalism-One species harm other unaffected $(-, 0)$ .
Example- When a cattle temple on grass the grass is crushed.
Competition- (-, -) Competition is an interaction between organisms for resource (Food, Water, Territory), in competition both the organism (competitor) are harmed.
Predation- One species benefits while one species die $(+, -)$ .
Neutralism- Both species unaffected $(0, 0)$ .

AIIMS-2016

Organisms and Populations

231188 Match the column I and II

1

(A) - i i i, (B) - i i, (C) - i v, (D) - i

2

(A) - i, (B) - i i, (C) - i i i, (D) - i v

3

(A) - i i, (B) - i i i, (C) - i, (D) - i v

4

(A) - i i, (B) - i i i, (C) - i v, (D) - i

Explanation:

Parasitism (+-):- The interaction in which only one species benefits and the interaction is harmful to the other species is called parasitism.
- E.g., Sheep (host) and liver fluke (parasite) in fluke disease in cattle.
Commensalism $(0, +)$ :- The interaction where one species is benefited and the other is unaffected is called commensalism.
- E.g., barnacles growing on the back of a whale.
- They don't harm the whales or feed on the whales, like true parasites do.
Amensalism ( $0, -$ ):- The interaction where one species is harmed while the other is unaffected is called amensalism.
- E.g., penicillium secretes penicillin which kills bacteria but it has no effect on penicillium itself.
Mutualism ( ++ ):- The interaction in which both the species are benefited is called mutualism.
- E.g., interaction between algae and fungi in lichen and interaction between fungi and roots of the higher plant in mycorrhiza.

AIIMS-27.05.2018 Shift-I / AIIMS-25.05.2019 Shift-I

Organisms and Populations

231177 Amensalism can be represented as:

1 Species A (+); Species B (0)

2 Species A (-); Species B (0)

3 Species A (+); Species B (+)

4 Species A (-); Species B (-)

Explanation:

Amensalism is an interaction between two organism of different species.
- In which one species certain inhibits the growth of other species of secreting certain chemicals.
- The first species is neither get benefited nor harmed.
- $(+) : (0)$ interactin is observed in commensalism.
- $(+) : (+)$ interactin is observed in mutualism.
$∙ (-) : (-)$ interactin is observed in competition.

NEET-2021

Organisms and Populations

231179 While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (-) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one specifies and (-) for another specifies involved in the interaction?

1 Competition

2 Predation

3 Amensalim

4 Commensalism

Explanation:

Predation:- Predation is the interaction between prey and a predators where the energy flows from one organism to the other organisms called prey predator are denoted by $(+, -)$
Competition:- Competition occurs when closely related species complete for the same resources that are limiting. It show usually $(-, -)$
Amensalim:- The relationship between organism from which one organism is negatively affected and the other organism is unaffected is termed as Amensalism. It's denoted by $(-, 0)$
Commensalism:- This is the interaction in which one species benefits and the other is neither harmed non benefited.
It is denoted as $(+, 0)$ .

NEET-2022

Organisms and Populations

231187 Match column I with column II and select the correct option from the codes given below :
| Column I | Column II |
|----|----|
| A. Commensalism | (i) One inhibited, other unaffected |
| B. Parasitism | (ii) One benefitted, other unaffected |
| C. Mutualism | (iii) Both are benefitted |
| D. Amensalism | (iv) One benefitted, other harmed |

1

A -

(iv),

B

- (ii),

C

- (iii),

D

- (i)

2

A -

(iii),

B -

(iv),

C -

(ii),

D -

(i)

3

A -

(ii),

B

- (iv),

C -

(iii),

D -

(i)

4

A -

(ii),

B

- (iv),

C -

(i),

D -

(iii)

Explanation:

Commensalism- where one species benefits while
other is unaffected $(+, 0)$ .
Example- A bird making a nest in a tree.
Parasitism - One species benefits while one is harmed
$(+, -)$ .
Example- Lice
Mutualism- Both species benefit $(+, +)$ Ex. Lichen.
Amensalism-One species harm other unaffected $(-, 0)$ .
Example- When a cattle temple on grass the grass is crushed.
Competition- (-, -) Competition is an interaction between organisms for resource (Food, Water, Territory), in competition both the organism (competitor) are harmed.
Predation- One species benefits while one species die $(+, -)$ .
Neutralism- Both species unaffected $(0, 0)$ .

AIIMS-2016

Organisms and Populations

231188 Match the column I and II

1

(A) - i i i, (B) - i i, (C) - i v, (D) - i

2

(A) - i, (B) - i i, (C) - i i i, (D) - i v

3

(A) - i i, (B) - i i i, (C) - i, (D) - i v

4

(A) - i i, (B) - i i i, (C) - i v, (D) - i

Explanation:

Parasitism (+-):- The interaction in which only one species benefits and the interaction is harmful to the other species is called parasitism.
- E.g., Sheep (host) and liver fluke (parasite) in fluke disease in cattle.
Commensalism $(0, +)$ :- The interaction where one species is benefited and the other is unaffected is called commensalism.
- E.g., barnacles growing on the back of a whale.
- They don't harm the whales or feed on the whales, like true parasites do.
Amensalism ( $0, -$ ):- The interaction where one species is harmed while the other is unaffected is called amensalism.
- E.g., penicillium secretes penicillin which kills bacteria but it has no effect on penicillium itself.
Mutualism ( ++ ):- The interaction in which both the species are benefited is called mutualism.
- E.g., interaction between algae and fungi in lichen and interaction between fungi and roots of the higher plant in mycorrhiza.

AIIMS-27.05.2018 Shift-I / AIIMS-25.05.2019 Shift-I

Organisms and Populations

231177 Amensalism can be represented as:

1 Species A (+); Species B (0)

2 Species A (-); Species B (0)

3 Species A (+); Species B (+)

4 Species A (-); Species B (-)

Explanation:

Amensalism is an interaction between two organism of different species.
- In which one species certain inhibits the growth of other species of secreting certain chemicals.
- The first species is neither get benefited nor harmed.
- $(+) : (0)$ interactin is observed in commensalism.
- $(+) : (+)$ interactin is observed in mutualism.
$∙ (-) : (-)$ interactin is observed in competition.

NEET-2021

Organisms and Populations

231179 While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (-) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one specifies and (-) for another specifies involved in the interaction?

1 Competition

2 Predation

3 Amensalim

4 Commensalism

Explanation:

Predation:- Predation is the interaction between prey and a predators where the energy flows from one organism to the other organisms called prey predator are denoted by $(+, -)$
Competition:- Competition occurs when closely related species complete for the same resources that are limiting. It show usually $(-, -)$
Amensalim:- The relationship between organism from which one organism is negatively affected and the other organism is unaffected is termed as Amensalism. It's denoted by $(-, 0)$
Commensalism:- This is the interaction in which one species benefits and the other is neither harmed non benefited.
It is denoted as $(+, 0)$ .

NEET-2022

Organisms and Populations

231187 Match column I with column II and select the correct option from the codes given below :
| Column I | Column II |
|----|----|
| A. Commensalism | (i) One inhibited, other unaffected |
| B. Parasitism | (ii) One benefitted, other unaffected |
| C. Mutualism | (iii) Both are benefitted |
| D. Amensalism | (iv) One benefitted, other harmed |

1

A -

(iv),

B

- (ii),

C

- (iii),

D

- (i)

2

A -

(iii),

B -

(iv),

C -

(ii),

D -

(i)

3

A -

(ii),

B

- (iv),

C -

(iii),

D -

(i)

4

A -

(ii),

B

- (iv),

C -

(i),

D -

(iii)

Explanation:

Commensalism- where one species benefits while
other is unaffected $(+, 0)$ .
Example- A bird making a nest in a tree.
Parasitism - One species benefits while one is harmed
$(+, -)$ .
Example- Lice
Mutualism- Both species benefit $(+, +)$ Ex. Lichen.
Amensalism-One species harm other unaffected $(-, 0)$ .
Example- When a cattle temple on grass the grass is crushed.
Competition- (-, -) Competition is an interaction between organisms for resource (Food, Water, Territory), in competition both the organism (competitor) are harmed.
Predation- One species benefits while one species die $(+, -)$ .
Neutralism- Both species unaffected $(0, 0)$ .

AIIMS-2016

Organisms and Populations

231188 Match the column I and II

1

(A) - i i i, (B) - i i, (C) - i v, (D) - i

2

(A) - i, (B) - i i, (C) - i i i, (D) - i v

3

(A) - i i, (B) - i i i, (C) - i, (D) - i v

4

(A) - i i, (B) - i i i, (C) - i v, (D) - i

Explanation:

Parasitism (+-):- The interaction in which only one species benefits and the interaction is harmful to the other species is called parasitism.
- E.g., Sheep (host) and liver fluke (parasite) in fluke disease in cattle.
Commensalism $(0, +)$ :- The interaction where one species is benefited and the other is unaffected is called commensalism.
- E.g., barnacles growing on the back of a whale.
- They don't harm the whales or feed on the whales, like true parasites do.
Amensalism ( $0, -$ ):- The interaction where one species is harmed while the other is unaffected is called amensalism.
- E.g., penicillium secretes penicillin which kills bacteria but it has no effect on penicillium itself.
Mutualism ( ++ ):- The interaction in which both the species are benefited is called mutualism.
- E.g., interaction between algae and fungi in lichen and interaction between fungi and roots of the higher plant in mycorrhiza.

AIIMS-27.05.2018 Shift-I / AIIMS-25.05.2019 Shift-I

Organisms and Populations

231177 Amensalism can be represented as:

1 Species A (+); Species B (0)

2 Species A (-); Species B (0)

3 Species A (+); Species B (+)

4 Species A (-); Species B (-)

Explanation:

Amensalism is an interaction between two organism of different species.
- In which one species certain inhibits the growth of other species of secreting certain chemicals.
- The first species is neither get benefited nor harmed.
- $(+) : (0)$ interactin is observed in commensalism.
- $(+) : (+)$ interactin is observed in mutualism.
$∙ (-) : (-)$ interactin is observed in competition.

NEET-2021

Organisms and Populations

231179 While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (-) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one specifies and (-) for another specifies involved in the interaction?

1 Competition

2 Predation

3 Amensalim

4 Commensalism

Explanation:

Predation:- Predation is the interaction between prey and a predators where the energy flows from one organism to the other organisms called prey predator are denoted by $(+, -)$
Competition:- Competition occurs when closely related species complete for the same resources that are limiting. It show usually $(-, -)$
Amensalim:- The relationship between organism from which one organism is negatively affected and the other organism is unaffected is termed as Amensalism. It's denoted by $(-, 0)$
Commensalism:- This is the interaction in which one species benefits and the other is neither harmed non benefited.
It is denoted as $(+, 0)$ .

NEET-2022

Organisms and Populations

231187 Match column I with column II and select the correct option from the codes given below :
| Column I | Column II |
|----|----|
| A. Commensalism | (i) One inhibited, other unaffected |
| B. Parasitism | (ii) One benefitted, other unaffected |
| C. Mutualism | (iii) Both are benefitted |
| D. Amensalism | (iv) One benefitted, other harmed |

1

A -

(iv),

B

- (ii),

C

- (iii),

D

- (i)

2

A -

(iii),

B -

(iv),

C -

(ii),

D -

(i)

3

A -

(ii),

B

- (iv),

C -

(iii),

D -

(i)

4

A -

(ii),

B

- (iv),

C -

(i),

D -

(iii)

Explanation:

Commensalism- where one species benefits while
other is unaffected $(+, 0)$ .
Example- A bird making a nest in a tree.
Parasitism - One species benefits while one is harmed
$(+, -)$ .
Example- Lice
Mutualism- Both species benefit $(+, +)$ Ex. Lichen.
Amensalism-One species harm other unaffected $(-, 0)$ .
Example- When a cattle temple on grass the grass is crushed.
Competition- (-, -) Competition is an interaction between organisms for resource (Food, Water, Territory), in competition both the organism (competitor) are harmed.
Predation- One species benefits while one species die $(+, -)$ .
Neutralism- Both species unaffected $(0, 0)$ .

AIIMS-2016

Organisms and Populations

231188 Match the column I and II

1

(A) - i i i, (B) - i i, (C) - i v, (D) - i

2

(A) - i, (B) - i i, (C) - i i i, (D) - i v

3

(A) - i i, (B) - i i i, (C) - i, (D) - i v

4

(A) - i i, (B) - i i i, (C) - i v, (D) - i

Explanation:

Parasitism (+-):- The interaction in which only one species benefits and the interaction is harmful to the other species is called parasitism.
- E.g., Sheep (host) and liver fluke (parasite) in fluke disease in cattle.
Commensalism $(0, +)$ :- The interaction where one species is benefited and the other is unaffected is called commensalism.
- E.g., barnacles growing on the back of a whale.
- They don't harm the whales or feed on the whales, like true parasites do.
Amensalism ( $0, -$ ):- The interaction where one species is harmed while the other is unaffected is called amensalism.
- E.g., penicillium secretes penicillin which kills bacteria but it has no effect on penicillium itself.
Mutualism ( ++ ):- The interaction in which both the species are benefited is called mutualism.
- E.g., interaction between algae and fungi in lichen and interaction between fungi and roots of the higher plant in mycorrhiza.

AIIMS-27.05.2018 Shift-I / AIIMS-25.05.2019 Shift-I

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