Organisms & Populations Questions
The predator maintain species diversity this can be explain by following experimental example :-
Match the following Column-I with Column-II
The two basic processes, contribute to an increase in population density in a given habitat during a given period time are
Which of the following statements is incorrect regarding the Logistic Growth Model?
Which of the following attributes is found in a 'Population' but NOT in an 'Individual'?
Complete the following table of Interspecific Interactions:
Read the following statements and select the correct option. Statement 1 : Species facing competition might evolve mechanisms that promote exclusion rather than co-existance. Statement 2 : Majority of parasites reduce the survival, growth and reprodu
Match the columns-I and II and choose the correct options given.
If the birth rate is 100, the death rate is 10 and the number of individuals in a population group is 1000, then what will be the intrinsic rate of natural increase of the population?
Match the following and Choose the correct answer
Graphs A and B shown below depict interaction of two species, Which graph indicates Mutualism ?
Which of the interactions has negative effects ? (i) Predation (ii) Mutualism (iii) Commensalism (iv) Parasitism
'X' in the given graph represents :
Given below are two statements: Statement I: In an expanding population, the number of pre-reproductive individuals is more than that of reproductive and post-reproductive individuals. Statement II: Sex ratio is a population attribute. In the light o
Match List-I with List-II. List-I (Organisms) List-II (Description of interaction between them) (A) Cuckoo laying eggs in Crow’s nest (I) One benefitted, another unaffected (B) Orchid growing as an epiphyte on a mango branch (II) One benefitted, anot
Which association shows mutualism?
Match commensalism examples: A. Orchid B. Barnacles C. Egret D. Sea anemone Options:
Human liver fluke depends on two intermediate hosts
Match the following: A. MacArthur B. Brood parasitism C. Sexual deceit D. Mycorrhizae E. Lichen Options:
Avoiding competition by using different resources/time is
Competitive exclusion principle was given by
Connell’s barnacle experiment showed
A species expands range when competitor is removed. This is
Feeding efficiency reduced due to presence of other species is
A process in which fitness of one species decreases due to another is
Select the false statement
Cryptic colouration of insects and frogs is called
Match the following (interaction vs effect): A. Mutualism B. Competition C. Predation & Parasitism D. Commensalism E. Amensalism Options:
Which of the following is wrong statement?
In the equation, K and N denote
Asymptote in logistic growth occurs when
Which is correctly labelled?
Formula of growth rate for population is
A biologist found natality 250, mortality 240, immigration 20, emigration 30. Net increase is
Under normal conditions, factors influencing population density are
Population density increases if
In the given figure, K, L, M & N depict the sign of
The number of individuals entering a habitat is called
Four basic processes that fluctuate population density are
In population attributes, N represents
Population density (N) of Siberian cranes at Bharatpur wetlands in any year is
In age pyramids, correct sequence is
In a pond, 48 lotus plants produce 18 new plants. Birth rate is
Population ecology links ecology to
A population is
Regarding altitude sickness, which statement is false?
In warm-blooded animals, shorter appendages in cold climates follow
If there is no external source of water, kangaroo rat produces water by
The morphological, physiological & behavioural attribute that enables survival is called
Which of the following is not an example of “suspend”?