MCQ (Single Correct Answer)
Which one of the following statements cannot be connected to Predation?
While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, ($$-$$) sign is assigned for detrimental in...
Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?
Amensalism can be represented as :
In the exponential growth equation Nt = N0ert, e represents
The process of growth is maximum during
Secondary metabolites such as nicotine,
strychnine and caffeine are produced by plants
for their
Which of the following is not an attribute of a
population?
The Earth summit held in Rio de Janeiro in 1992 was called :
Match Column-I with Column –II.
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Which one of the following population
interactions is widely used in medical science
for the production of antibiotics?
Pneumatophores occur in
Niche is
Natality refers to
Which one of the following plants shows a
very close relationship with a species of moth,
where none of the two can complete its life
cycle without th...
In a growing population of a country,
Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :
Plants which produce characteristic pneumatophores and show vivipary belong to :
Asymptote in a logistic growth curve is obtained when :
Mycorrhizae are the example of :
Which of the following is correct for r-selected species ?
If '+' sign is assigned to beneficial interaction, '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction repres...
The principle of competitive exclusion was stated by
It is much easier for a small animals to run uphill than for a large animal, because -
Gause's principle of competitive exclusion states that -
When does the growth rate of a population following the logistic model equal zero? The logistic model is given as
dN/dt = rN(1-N/K)
An association of individuals of different
species living in the same habitat and
having functional interactions is -
In which of the following interactions both
partners are adversely affected?
The following graph depicts changes in two populations (A and B) of herbivores in a grassy field. A possible reason for these
changes is that:
...
Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot
summer, thousands of migratory birds from Siberia and other ex...
The age pyramid with broad base indicates :
Which one of the following is not a parasitic
adaptation ?
Benthic organisms are affected most by :
A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :
Besides paddy fields, cyanobacteria are also found inside vegetative part of :
A biologist studied the population of rats in a barn, He found that the average natality was 250, average
mortality 240, immigration 20 and emigration...
Cuscuta is an example of :
The logistic population growth is expressed by
the equation :
What type of human population is represented
by the following age pyramid ?
...
Large Woody Vines are more commonly found in
Consider the following four conditions (a – d)
and select the correct pair of them as adaptation
to environment in desert lizards.
The conditions :
(...
Which one of the following is categorised as a
parasite in true sense ?
Which one of the following is most
appropriately defined ?
The figure given below is a diagrammatic
representation of response of organisms to
abiotic factors. What do a, b and c represent
respectively –
...
Which one of the following is one of the
characteristics of a biological community?
A country with a high rate of population growth
took measures to reduce it. The figure below
shows age-sex pyramids of populations A and B
twenty year...
Reduction in vascular tissue, mechanical tissue
and cuticle is characteristic of :
Consider the following four statements (1-4) about
certain desert animals such as kangaroo-rat.
(i) They have dark colour and high rate of
reproducti...
Quercus species are the dominant component in:
Geometric representation of age structure is a characteristic of :-
The population of an insect species shows an
explosive increase in numbers during rainy
season followed by its disappearance at the end
of the season....
If the mean and the median pertaining to a
certain character of a population are of the same
value, the following is most likely to occur:-
A high density of elephant population in an area
can result in :-
Niche overlap indicates-
More than 70% of world's fresh water is
contained in –
At which latitude, heat gain through insolation
approximately equals heat loss through
terrestrial radiation -
Which one of the following pairs in
mismatched ?
Animals have the innate ability to escape from
predation. Examples for the same are given
below. Select the incorrect example
Certain characteristic demographic features of
developing countries are -
What is a keystone species ?
In which of the following pairs is the specific
characteristic of a soil not correctly matched ?
The maximum growth rate occurs in :-
In which one of the following habitats does the
diurnal temperature of soil surface vary most ?
Mycorrhiza is an example of :-
What is true for individuals of same species ?
Which type of association is found in between
entomophilous flower and pollinating agent ?
Two different species can not live for long duration
in the same niche or habitat. This law is : -