Which of the following communities is more vulnerable to invasion by outside animals and plants?
A.Mangroves
B.Tropical evergreen forests
C.Temperate forests
D.Oceanic island communities
Category: Population Biotic Community Mcqs
If a piece of land which had a plant community becomes barren due to some external thrust, the succession taking place here is called:
A.Induced
B.Deflated
C.Secondary
D.Retrogessive
Which of the following does not constitute a part of sigmoid curve?
A.Lag phase
B.Linear phase
C.Stationary phase
D.Exponential phase
The level beyond which no major increase is possible represents:
A.Stationary phase
B.Biotic potential
C.Acceleration limit
D.Carrying capacity
The primary succession refers to the development of communities on a:
A.Freshly cleared crop field
B.Forest clearing after devastating fire
C.Pons, freshly filled water after a dry phase
D.Newly-exposed habitat with no record of earlier vegetation
The mycorrhizae present in association with higher plant roots are best described as:
A.Keystone species
B.Edge species
C.Critical link species
D.Edaphic pod species
During ecological succession from pioneers to climax community the biomass of vegetation:
A.Increases, then decreases
B.Remains constant
C.Decreases continuously
D.Increases continuously
The populations increase in their number due to:
A.Mortality
B.Natality
C.Dispersal
D.Emigration
According to polyclimax hypothesis, the climax stage is controlled by:
A.Edaphic factors
B.Biotic factors
C.Topographic factors
D.All of these
Which of the following is not a primary coloniser?
A.Blue-green algae
B.Viruses
C.Lichens
D.Mosses
