GEOGRAPHY MCQS SET 104

GEOGRAPHY MCQS SET 104

1031) In an ecotone, the species which become abundant are called
A) edge species
B) keystone species
C) endemic species
D) foster species

Answer: edge species
   
1032) The word 'ecosystem' was coined by
A) Charles Darwin
B) Robert Whittaker
C) Arthur Tansley
D) Ernst Haeckel

Answer: Arthur Tansley
   
1033) The organisms which feed on bodies of the dead organisms are
A) scavengers
B) decomposers
C) carnivores
D) Both 'a' and 'b'
 
Answer: Both 'a' and 'b'
   
1034) There is a concern, over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon?
1. Discharge of nutrients from the estuaries
2. Run-off from the land during the monsoon t
3. Upwelling in the seas
Select the correct answer from the codes given below
A) Only 1
B) 1 and 2
C) 2 and 3
D) 1,2 and 3

Answer: 1,2 and 3
   
1035) With reference to the food chains in ecosystems, which of the following
kinds of organism is/are known as decomposer organism/organisms? [UPSC 2013]
1. Virus 2. Fungi
3. Bacteria
Select the correct answer using the codes given below
A) Only 1
B) 2 and 3
C) 1 and 3
D) All of these

Answer: 2 and 3

1036) Consider the following statements with reference to foodchains in ecosystems
1. A food chain illustrates the order, in which a chain of organisms feed upon each other.
2. Foodchains are found within the population of a species.
3. A food chain illustrates the numbers of each organism, which are eaten by others.
Which of the statements given above is/are correct?
A) Only1
B) 1 and 2
C) All of these
D) None of these

Answer: Only1
   
1037) In Nitrogen Cycle, soil nitrates are transformed into free nitrogen by
A) nitrifying bacteria
B) denitrifying bacteria
C) ammonifying bacteria
D) Both 'a' and 'c'

Answer: denitrifying bacteria
   
1038) An aquatic plant introduced from America to check pollution turned out to
be a troublesome weed in Indian water bodies. The name of this 'invasive alien
species' is
A) opuntia
B) segilops
C) richhornia
D) pistia

Answer: richhornia
   
1039) Which among the following within processes helps in evolution?
1. Natural selection 2. Adaptation
3. Mutation
4. Reproductive isolation
A) 1,2 and 3
B) 2,3 and 4
C) 2 and 3
D) All of these

Answer: All of these
   
1040) Study of plant communities in relation to their habitats of a given ecosystem is called as
A) Synocology
B) Hexicology
C) Ethology
D) Autecology

Answer: Synocology