Organism_Population_Biotic comunity & Succession(A) (NEET/AIIMS Online Practice Exam)

Which of the following U.V. radiation is lethal :-
1. UV-A
2. UV-B
3. UV-C
4. All of these
Which of the following wavelength of solar radiation is known as photosynthetically active radiation (PAR) ?
1. 0.1 µm to 0.4 µm
2. 0.4 µm to 0.7 µm
3. 0.7 µm to 0.9 µm
4. All of these
Organisms found on the bottom of sea are :-
1. Planktons
2. Benthos
3. Neustons
4. Phytons
A large regional unit characterised by a major vegetation type and associated with fauna found in a specific climatic zone is termed as :-
1. Landscape
2. b
3. c
4. d
Instruction for Questions :
In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R) just below it. Examine these statements carefully and select your answer to these questions from the codes given below:-
a. If both A and R are true and the R is a correct explanation of A
b. If both A and R are true but R is not a correct explanation of A
c. If A is true and R is wrong
d. If both A and R are wrong
Assertion :-Amensalism shows (+, 0) interspecific interactions.
Reason :-In amensalism, one partner is benefitted while other remains unaffected.
1. a
2. b
3. c
4. d
Instruction for Questions :
In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R) just below it. Examine these statements carefully and select your answer to these questions from the codes given below :-
a. If both A and R are true and the R is a correct explanation of A
b. If both A and R are true but R is not a correct explanation of A
c. If A is true and R is wrong
d. If both A and R are wrong
Assertion :-Pheromones are intraspecific chemical signals.
Reason :-Locustrol secreted by adult locust stimulates the development in lymph locust.
1. a
2. b
3. c
4. d
Limnetic zone is :-
1. The shallow water zone around the edge of lake which supports rooted vegetation
2. The open water zone beyond the littoral zone
3. The zone where light does not reach
4. Both (The shallow water zone around the edge of lake which supports rooted vegetation) and (The open water zone beyond the littoral zone)
The water potential of a soil at field capacity is around :-
1. 0.01 Mega Pascal (MPa)
2. – 0.1 Mega Pascal (MPa)
3. – 1.5 Mega Pascal (MPa)
4. + 1.5 Mega Pascal (MPa)
The value of lapse rate is :-
1. 6.5ºC per 1000 m elevation
2. 6.5ºC per 100 m elevation
3. 7.5ºC per 1000 m elevation
4. 7.5ºC per 100 m elevation
The timing of seasonal activities of plants in relation to change in environmental condition is termed as :-
1. Photobiology
2. Phenology
3. Trophology
4. Anthology
The amount of capillary water retained by a unit weight of soil under controlled condition is referred as :-
1. Water holding capacity
2. Storage capacity
3. Chesard
4. All of these
The mineral particle size present in clay is of :-
1. 0.02 to 0.2 mm
2. 0.002 to 0.02 mm
3. Less than 0.002
4. 0.2 to 2 mm
The pH range of fertile soil is :-
1. 3-4
2. 6-7
3. 8-9
4. 10-11
Soil profile develops due to :-
1. Weathering process
2. Accumulation of organic matter
3. Leaching of mineral matter
4. All of these
Which of the following is correct ?
1. Holard + Chesard = Ecard
2. Holard – Chesard = Ecard
3. Ecard + Chesard = Holard
4. Holard – Ecard = Chesard
The plant succession initiated on burnt land is :-
1. Lithosere
2. Hydrosere
3. Pyrophilous
4. All of these
Soil transported by wind is called :-
1. Colluvial
2. Alluvial
3. Eolian
4. Glacial
The process in which the mimic shares the same defensive mechanism as the model termed as :-
1. Batesian mimicry
2. Mullerian mimicry
3. Warning colouration
4. Both (Mullerian mimicry) and (Warning colouration)
A population of individuals of species which are genetically different is termed as :-
1. Ecad
2. Phenotype
3. Ecotype
4. All of these
The best suitable for plant growth is :-
1. Sandy
2. Loamy
3. Free of humus
4. Clay
Which of the following pairs are correctly matched ?
A.Thermocline – Zone of gradual change in temperature
B.Epilimnion – Upper layer of water
C.Hypolimnion – Lower layer of water
Select the correct answer using the codes given below :-
1. B and C
2. A and B
3. A and C
4. A, B and C
In the given graph, which of the following region indicates zone of tolerance :-
1. P
2. Q
3. R
4. S
Dunaliella species, a green halophytic algae, can tolerate saline condition due to presence of :-
1. Glycerol in cells
2. Proline in cells
3. Chaperonins in cells
4. Both (Glycerol in cells) and (Proline in cells)
The sciophytes generally have :-
1. Low photosynthetic rate and high respiratory and metabolic activities
2. High photosynthetic rate and low respiratory and metabolic activities
3. Low photosynthetic, respiratory and metabolic activities
4. High photosynthetic, respiratory and metabolic activities
The protein which provides physiological adaptation to plants inhabiting in high temperature zone is :-
1. Expansin
2. Diaminopimelic acid
3. Chaperonins
4. All of these
Competition is most severe between two :-
1. Closely related species growing in different niches
2. Closely related species growing in the same habitat
3. Distantly related species growing in the same habitat
4. Distantly related species growing in different niches
Synecology is the study of :-
1. Human environment of a place
2. Biotic environment of a place
3. Abiotic component of a place
4. Biotic community in relation to environment of a place
Altruistic behaviour is shown by :-
1. Spotted dear
2. Worker in bee colony
3. Wild Turkeys
4. All the these
Biotic potential is increase in population under :-
1. Natural conditions
2. Climatic conditions
3. Optimum conditions
4. Given conditions
Vital index is :-
1. Mortality/Natality
2. Natality/Mortality
3. Natality/Mortality X 100
4. Mortality/Natality X 1000
Territory is defended against :-
1. Predator
2. Any intruder
3. Intruder of same species
4. Intruder of different species
Brown skinned human race is :-
1. Mongoloid
2. Polynesian
3. Red Indian
4. Australoid
Mule is not considered to be a species because :-
1. It does not reproduce
2. It is a hybrid
3. It has distinct Morphology
4. It has distinct cytology
Negative growth rate is present in :-
1. Germany
2. U.S.A.
3. France
4. Australia
Hinny is a product of :-
1. Male donkey + mare
2. Female donkey + stallion
3. Male donkey + stallion
4. Female donkey + mare
Two species cannot occupy same niche. The law is :-
1. Wein Law
2. Gause Law
3. Allen Law
4. Competition Exclusion principle
Enormous increase in human population is :-
1. Not uniform in all countries
2. Uniform in all countries
3. More in developed countries
4. Less in developed countries
An example of colonial organism :-
1. Physalia
2. Volvox
3. Zulu
4. All of these
Hyaena, jackal, vulture and crow are :-
1. Parasitic animals
2. Scavenging animals
3. Amensal animals
4. Symbiotic animals
Man made forest cover ....... of total land in India :-
1. 7%
2. 16–17%
3. 20–25%
4. 2%
Large scale exodus to commit suicide is a usual practice in :-
1. Cranes
2. Lemmings
3. Rats
4. Amazons
A bird introduced from another country became a serious pest due to :-
1. Better adaptation to new area
2. More sexual reproduction
3. Better nesting habitats
4. Absence of natural competition
Mutualism and proto-co-operation are :-
1. Positive interactions
2. Negative interactions
3. Both "Positive interactions" & "Negative interactions"
4. None of these
Symbiosis term was given by :-
1. Haeckel
2. Reiter
3. De Bary
4. Leeuwenhoek
In ecological succession from pioneer to climax community, the biomass shall :-
1. Decrease
2. Increase and then decrease
3. No relation
4. Increase continuously
Plant succession occurring in a sandy area is :-
1. Psammosere
2. Halosere
3. Xerosere
4. Hydrosere
Biotic potential of human species is estimated...... per female during required period of 16-44 years of age :-
1. 12
2. 14
3. 18
4. 3
The average temperature near tropopause is :-
1. 15°C
2. 30°C
3. – 30°C
4. – 57°C
Allelopathy is due to release of :-
1. Pheromones
2. Chemicals
3. Toxins
4. Poisons
Proportion of young individuals is highest in case of :-
1. Declining population
2. Stable population
3. Both (Declining population) and (Stable population )
4. Expanding population

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Organism_Population_Biotic comunity & Succession(A) (NEET/AIIMS Online Practice Exam)

MCQ