Population Interactions Competition

A high density of elephant population in an area can result in:

1. mutualism

2. Intraspecific competition

3. Interspecific completion

4. Predation on one another

According to Darwin, organic evolution is due to:

1.	Interspecific competition.
2.	Competition within closely related species.
3.	Reduced feeding efficiency in one species due to the presence of interfering species.
4.	Intraspecific competition.

In which of the following interactions both partners are adversely affected?

1.	Competition	2.	Predation
3.	Parasitism	4.	Mutualism

The principle of competitive exclusion was stated by?

1. C. Darwin

2. G. F. Gause

3. MacArthur

4. Verhulst and Pearl

Match the items in Column-I with those in Column-II:

	Column-I		Column-II
(a)	Herbivores-Plants	(i)	Commensalism
(b)	Mycorrhiza-Plants	(ii)	Mutualism
(c)	Sheep-Cattle	(iii)	Predation
(d)	Orchid-Tree	(iv)	Competition

Select the correct option from the following:

Options:	(a)	(b)	(c)	(d)
1.	(iv)	(ii)	(i)	(iii)
2.	(iii)	(ii)	(iv)	(i)
3.	(ii)	(i)	(iii)	(iv)
4.	(i)	(iii)	(iv)	(ii)

Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

1.	Mutualism	2.	Predation
3.	Resource partitioning	4.	Competitive release

Match List-I with List-II

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

Choose the correct answer from the options given below:

Options:	A	B	C	D
1.	III	I	IV	II
2.	IV	II	I	II
3.	IV	I	II	III
4.	IV	III	I	II

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:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.

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 an egg in a Crow's nest	II.	Brood parasitism
C.	Fungi and root of a higher plant mycorrhizae	III.	Mutualism
D.	A cattle egret and a Cattle in a field	IV.	Commensalism

Choose the correct answer from the options given below:

Options:	A	B	C	D
1.	II	III	I	IV
2.	I	II	III	IV
3.	I	II	IV	III
4.	III	IV	I	II