STD 12 - 11. organisms and populations - Rajasthan Board (RBSE) STD 12 Science BIOLOGY Questions

Given below are two statements:

Statement $I$: Gause's competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.

Statement $II$: According to Gause's principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.

In the light of the above statements, choose the correct answer from the options given below :

A
Both Statement $I$ and Statement $II$ are false.
B
Statement $I$ is true but Statement $II$ is false.
✓
Statement $I$ is false but Statement $II$ is true.
D
Both Statement $I$ and Statement $II$ are true.

Answer: C.

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Q 2M.C.Q (0.5 Marks)1 Mark

The equation of Verhulst-Pearl logistic growth is $\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}\left[\frac{\mathrm{K}-\mathrm{N}}{\mathrm{K}}\right]$.

From this equation, $\mathrm{K}$ indicates:

A
Biotic potential
✓
Carrying capacity
C
Population density
D
Intrinsic rate of natural increase

Answer: B.

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Q 3M.C.Q (0.5 Marks)1 Mark

Match List $I$ with List $II$.

List $I$ (Interacting species)	List $II$ (Name of interaction)
$A$. A Leopard and a Lion in a forest/grassland	$I$. Competition
$B$. A Cuckoo laying egg in a Crow's nest	$II$. Brood parasitism
$C$. Fungi and root of a higher plant in Mycorrhizae	$III$. Mutualism
$D$. A cattle egret and a Cattle in a field	$IV$. Commensalism

Choose the correct answer from the options given below.

A
A-II, B-III, C-I, D-IV
✓
A-I, B-II, C-III, D-IV
C
A-I, B-II, C-IV, D-III
D
A-III, B-IV, C-I, D-II

Answer: B.

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Q 4M.C.Q (0.5 Marks)1 Mark

Given below are two statements:

Statement $I:$ Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually.

Statement $II:$ In general, carnivores are more adversely affected by competition than herbivores.

In the light of the above statements, choose the correct answer from the options given below:

A
Statement $I$ is incorrect but Statement $II$ is true.
B
Both Statement $I$ and Statement $II$ are true.
C
Both Statement $I$ and Statement $II$ are false.
✓
Statement $I$ is correct Statement $II$ is false.

Answer: D.

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Q 5M.C.Q (0.5 Marks)1 Mark

Match List $I$ with List $II$ :

List $I$ (Interaction)	List $II$ (Species $A$ and $B$)
$A$. Mutualism	$I$. $+(A), 0(B)$
$B$. Commensalism	$II$. $-(A), 0(B)$
$C$. Amensalism	$III$. $+(A),-(B)$
$D$. Parasitism	$IV$. $+(A),+(B)$

Choose the correct answer from the options given below:

A
A-III, B-I, C-IV, D-II
B
A-IV, B-II, C-I, D-III
✓
A-IV, B-I, C-II, D-III
D
A-IV, B-III, C-I, D-II

Answer: C.

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STD 12 - 11. organisms and populations question types

STD 12 - 11. organisms and populations questions

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STD 12 - 11. organisms and populations BIOLOGY - STD 12 - 11. organisms and populations

STD 12 - 11. organisms and populations question types

STD 12 - 11. organisms and populations questions

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