NEET Biology Plant Ecology Mock-Test-4

Fundamental unit of nature is

(A) Organisms
(B) Environment
(C) Ecosystem
(D) Ecology



The purpose of developing a carbon tax system in many countries is to

(A) Reduce green house gases
(B) Cut down CO₂ in atmosphere
(C) Cut down CO in atmosphere
(D) All the above



What changes occur during ecological succession?

(A) Diversity and stability increase
(B) Non-living organic matter and food chains increase
(C) Biomass and energy flow increase
(D) All of the above



Primary succession refers to development of communities on a

(A) Newly exposed habitat with no record of earlier vegetation
(B) Pond freshly filled with water after a dry phase
(C) Forest clearing after devastating fire
(D) Freshly cleared crop field



If the vegetation of a place is burnt the first one to appear will be

(A) mosses
(B) lichens
(C) liver worts
(D) grasses



An orderly sequence of community development on an area is called

(A) Succession .
(B) Cover
(C) Establishment
(D) Diversity



The terminal stage of a successional process is called

(A) Final stage
(B) Climax stage
(C) Serai stage
(D) Pioneer stage



If the pioneer stage is dominated by autotrophs then the succession is called

(A) Allogenic
(B) Autogenic
(C) Autotrophic
(D) Heterotrophic



Which is not a characteristic of serai stages ?

(A) Simplified food chain
(B) Few and generalized niches
(C) Low net community productivity (NCP)
(D) Low energy use efficiency



The serial changes in previously sterile or total barren area are collectively called

(A) Climatic climax
(B) Secondary succession
(C) Primary succession
(D) Sere



A community that is in near equilibrium with the environment during ecological sucession is

(A) Trophic level
(B) Food chain
(C) Climax community
(D) Food web



In the successive serai stages there is a change in the

(A) Diversity of species of organisms
(B) Number of species of organisms
(C) Increase of total biomass
(D) All the above



Sucession starts on the large rock is called

(A) Secondary succession
(B) Primary succession
(C) Climax community
(D) Ecological pyramid



Researchers like Robert Constanza et. al, have put an average price tag of US $ …. Trillion a year on the fundamental ecological services

(A) 33
(B) 50
(C) 6
(D) 40



Succession stages that occur in salt marshes is called

(A) Psammosere
(B) Halosere
(C) Lithosere
(D) Hydrosere



Plant succession taking place in sandy area is

(A) halosere
(B) xerosere
(C) lithosere
(D) psammosere



During the process of ecological succession

(A) Species diversity decreases
(B) Structural complexity decreases
(C) Niche become specialised
(D) Food chain relationship becomes simple



Lichens and mosses are observed in

(A) hydrosere
(B) xerosere
(C) hydrarch succession
(D) psammosere