iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
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)
A.
When death rate is greater than birth rate.
B.
When N/K equals zero.
C.
When N/K is exactly one.
D.
When N nears the carrying capacity of the habitat.
Correct Answer: C
Explanation:
In logistic growth model population
growth equation is described as
${{dN} \over {dt}} = rN\left( {1 - {N \over K}} \right)$
N = population density at time t;
r = Intrinsic rate of natural increase;
K = carrying capacity
When N/K = 1; ${1 - {N \over K}}$ = 0
Therefore, ${{dN} \over {dt}} = 0$
2016
Q52
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Gause's principle of competitive exclusion states that -
A.
Larger organisms exclude smaller ones through competition
B.
More abundant species will exclude the less abundant species through competition
C.
Competition for the same resources excludes species having different food preferences
D.
No two species can occupy the same niche indefinitely for the same limiting resources
Correct Answer: D
Explanation:
Gause’s principle of competitive
exclusion can be restated to say that no two
species can occupy the same niche indefinitely
when resources are limiting. Certainly species
can and do coexist while competing for some
of the same resources. Nevertheless, Gause’s
theory predicts that when two species coexist
on a long-term basis, either resources must not
be limited or their niches will always differ in
one or more features; otherwise, one species
will outcompete the other and the extinction
of the second species will inevitably result, a
process referred to as competitive exclusion.
2015
Q53
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
In which of the following interactions both
partners are adversely affected?
A.
Competition
B.
Predation
C.
Mutualism
D.
Parasitism
Correct Answer: A
Explanation:
Competition is the rivalry between two or
more organisms for obtaining the same resources
such as food, light, water, space, shelter, mate, etc.
Competitors adversely affect each other.
2015
Q54
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
An association of individuals of different
species living in the same habitat and
having functional interactions is -
A.
Ecological niche
B.
Ecosystem
C.
Population
D.
Biotic community
Correct Answer: D
Explanation:
Biotic community is an association
of individuals of different species living in
the same habitat and showing functional
interactions.
2015
Q55
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
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:
A.
Population B competed more successfully for food than population A
B.
Population A consumed the members of population B
C.
Both plant populations in this habitat decreased
D.
Population A produced more offspring than population B
Correct Answer: A
Explanation:
The given graph illustrates that population
B got success in the grassy field in comparison to
population A
2014
Q56
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
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 extremely cold northern regions
move to:
A.
Keolado National Park
B.
Meghalaya
C.
Corbett National Park
D.
Western Ghat
Correct Answer: A
Explanation:
The Keoladeo National Park is a famous
avifauna sanctuary in India that plays host
to thousands of birds especially during the
summer season. It is formerly known as
the Bharatpur Bird Sanctuary in Bharatpur,
Rajasthan. October to February is the best
time, for the migratory birds are there as well
as the residents. In August local birds start
their nest building and rear their young for
the next few months. October/November is
when the migrants arrive. Most stay till March
including the Siberian Crane.
2013
Q57
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Benthic organisms are affected most by :
A.
Surface turbulence of water
B.
Water-holding capacity of soil
C.
Light reaching the forest floor
D.
Sediment characteristics of aquatic ecosystems
Correct Answer: D
Explanation:
The sediment characteristics often
determine the type of benthic animals that
can thrive there.
2013
Q58
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Which one of the following is not a parasitic
adaptation ?
A.
Loss of digestive organs
B.
Loss of unnecessary sense organs
C.
Development of adhesive organs
D.
Loss of reproductive capacity
Correct Answer: D
Explanation:
In Parasitism, one species (parasite) is
benefitted and the other (host) is harmed.
Parasites have very high reproduction
capacity. The life cycles of parasites are often
complex, involving one or two intermediate
hosts or vectors to facilitate parasitisation of
its primary host.
2013
Q59
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
The age pyramid with broad base indicates :
A.
high percentage of young individuals
B.
high percentage of old individuals
C.
a stable population
D.
low percentage of young individuals
Correct Answer: A
Explanation:
Age pyramid is a graphic representation
of abundance of individuals of different age groups
with pre-reproductive individuals at the base,
reproductive individuals in the middle and postreproductive individuals at the top. Triangular age
pyramid has high proportion of pre-reproductive
individuals, moderate number of reproductive
individuals and fewer post-reproductive individuals.
It represents young or rapidly growing population.
In bell-shaped age pyramid, the number of prereproductive and reproductive individuals is almost
equal. Post -reproductive individuals are
comparatively fewer. It represents stable or
stationary population where growth rate is nearly
zero. In urn-shaped age pyramid, the number of
reproductive individuals is higher than the number
of pre-reproductive individuals. It represents
declining or diminishing population.
2013
Q60
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
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 30. The net increase in population is :
A.
15
B.
05
C.
10
D.
zero
Correct Answer: D
Explanation:
Net increase in population :
(Natality + Immigration) – (Mortality
+ Emigration)
(250 + 20) – (240 + 30) = 270 – 270 = 0
2013
Q61
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Besides paddy fields, cyanobacteria are also found inside vegetative part of :
A.
Cycus
B.
Psilotum
C.
Pinus
D.
Equisetum
Correct Answer: A
Explanation:
Coralloid roots of Cycas have symbiotic
association with blue-green algae like Nostoc and
Anabaena. Coralloid roots are irregular, negatively
geotropic, dichotomously branched coral like roots
which do not possess root hairs and root caps.
2013
Q62
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :
A.
Commensalism
B.
Commensalism
C.
Ectoparasitism
D.
Symbiosis
Correct Answer: D
Explanation:
Sea anemone gets associated to the shell
of hermit crab. It provides camouflage and protection
to the crab due to presence of stinging cells in sea
anemone. In turn, sea anemone is transported to new
places reaching new food sources. This is symbiosis
as both the organisms are benefitted.
2012
Q63
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Cuscuta is an example of :
A.
Ectoparasitism
B.
Predation
C.
Endoparasitism
D.
Brood parasitism
Correct Answer: A
Explanation:
Cuscuta, or Dodder plant, is a parasitic
plant that wraps around other plants for
nourishment. Cuscuta is found on outer side
of the host and is total stem parasite. Cuscuta
a parasite of Acacia.
2011
Q64
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
The logistic population growth is expressed by
the equation :
A.
$dt/dN = Nr\left( {{{K - N} \over K}} \right)$
B.
$dN/dt = rN\left( {{{K - N} \over K}} \right)$
C.
$dN/dt = rN\left( {{{N - K} \over N}} \right)$
D.
$dN/dt = rN$
Correct Answer: B
Explanation:
The logistic population growth is
expressed by the equation ${{dN} \over {dt}} = rN\left( {{{\left( {K - N} \right)} \over K}} \right)$
where N is population density at time t, r is
the Malthusian parameter (rate of maximum
population growth) and K is the so called
carrying capacity (i.e. maximum sustainable
population). It is a type of population growth
when resources are limiting.
2011
Q65
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Which one of the following is categorised as a
parasite in true sense ?
A.
The female anopheles bites and sucks blood
from humans
B.
Head louse living on the human scalp as
well as laying eggs on human hair
C.
The cuckoo (koel) lays its eggs in crow's
nest
D.
Human foetus developing inside the uterus
draws nourishment from the mother
Correct Answer: B
Explanation:
Head louse is an obligate ectoparasite
of human scalp and as well as laying egg on
human hair.
2011
Q66
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
What type of human population is represented
by the following age pyramid ?
A.
Declining population
B.
Vanishing population
C.
Expanding population
D.
Stable population
Correct Answer: A
Explanation:
This age pyramid represents the declining
population of any organism. Population
decline is the reduction over time in region’s
census. It can be caused for several reasons
that includes heavy immigration disease,
famine or sub-replacement fertility.
2011
Q67
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Consider the following four conditions (a – d)
and select the correct pair of them as adaptation
to environment in desert lizards.
The conditions :
(a) burrowing in soil to escape high temperature
(b) losing heat rapidly from the body during high
temperature
(c) bask in sun when temperature is low
(d) insulating body due to thick fatty dermis
A.
(c), (d)
B.
(b), (d)
C.
(a), (c)
D.
(a), (b)
Correct Answer: C
Explanation:
Desert lizards lack the physiological ability
that mammals have to deal with the high temperatures
of their habitat, but manage to keep their body
temperature fairly constant by behavioural means.
They bask in the sun and absorb heat when their
body temperature drops below the comfort zone,
but move into shade when the ambient temperature
starts increasing. Some species are capable of
borrowing into the soil to hide and escape from the
above-ground heat.
2011
Q68
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Large Woody Vines are more commonly found in
A.
Mangroves
B.
Tropical rainforests
C.
Alpine forests
D.
Temperate forests
Correct Answer: B
Explanation:
Lianas are large climbing woody vines that
drape tropical rainforest trees. They have adapted
to life in rainforest by having their roots in the ground
and climbing high onto the tree canopy to reach
available sunlight. Many lianas start life in the
rainforest canopy and send roots down to the
ground.
2010
Q69
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Which one of the following is most
appropriately defined ?
A.
Parasite is an organism which always lives
inside the body of other organism and may
kill it.
B.
Host is an organism which provides food to
another organism.
C.
Amensalism is a relationship in which one
species is benefited where as the other is
unaffected
D.
Predator is an organism that catches and
kills other organism for food.
Correct Answer: D
Explanation:
Predation is an interaction between
members of two species in which members of one
species capture, kill and eat up members of other
species. Host is a term which is specifically related
to parasitism. Amensalism is an interspecies
interaction in which one species is harmed whereas
the other one is unaffected. Parasitic organism can
live both over the surface of their host or inside
their body.
2010
Q70
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Which one of the following is one of the
characteristics of a biological community?
A.
Mortality
B.
Sex-ratio
C.
Stratification
D.
Natality
Correct Answer: C
Explanation:
Stratification is one of the characteristics
of biological community. Natality, mortality,
age, structure and sex ratio are basic
characteristics of a population.
2010
Q71
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
The figure given below is a diagrammatic
representation of response of organisms to
abiotic factors. What do a, b and c represent
respectively –
Some organisms are able to maintain
homeostasis by physiological (sometimes
behavioural also) means which ensures constant
body temperature, constant osmotic concentration,
etc. They are known as regulators. A majority of
animals and plants cannot maintain a constant
internal environment. Their body temperature
changes with the ambient temperature. These animals
and plants are simply conformers. During the course
of evolution, the costs and benefits of maintaining a
constant internal environment are taken into
consideration. Some species have evolved the ability
to regulate, but only over a limited range of
environmental conditions, beyond which they simply
conform. They are known as partial regulators.
2009
Q72
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
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 years apart. Select the correct
interpretation about them : –
A.
"A" is more recent shows slight reduction in
the growth rate
B.
"B" is more recent showing that population
is very young
C.
"A" is the earlier pyramid and no change has
occurred in the growth rate
D.
"B" is earlier pyramid and shows stabilized
growth rate
Correct Answer: A
Explanation:
‘A’ is more recent and shows slight
reduction in growth rate.
2009
Q73
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Reduction in vascular tissue, mechanical tissue
and cuticle is characteristic of :
A.
Xerophytes
B.
Epiphytes
C.
Hydrophytes
D.
Mesophytes
Correct Answer: C
Explanation:
Reduction in vascular tissue, mechanical
tissue and cuticle is characteristic of
hydrophytes.
2008
Q74
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Consider the following four statements (1-4) about
certain desert animals such as kangaroo-rat.
(i) They have dark colour and high rate of
reproduction and excrete solid urine
(ii) They do not drink water, breathe at a slow
rate to conserve water and have their body
covered with thick hairs
(iii) They feed on dry seeds and do not required
drinking water
(iv) They excrete very concentrated urine and do
not use water to regulate body temperature
Out of these four, which two are correct-
A.
(i) and (ii)
B.
(ii) and (iii)
C.
(iii) and (i)
D.
(iii) and (iv)
Correct Answer: D
Explanation:
Characteristics of certain desert animals
such as kangaroo, rat are -
• They feed on dry seeds and do not
require drinking water.
• They excrete very concentrated urine
and do not use water to regulate body
temperature.
2008
Q75
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Quercus species are the dominant component in:
A.
Temperate deciduous forests
B.
Alpine forests
C.
Scrub forests
D.
Tropical rain forests
Correct Answer: A
Explanation:
Species richness refers to the number of
species per unit area. Species evenness is the
relative abundance with which each species
is represented in an area. Thus variation in
the number of species, kinds of species as
well as the number of individuals per species
lead to greater diversity. Area(d) and number
of habitats (12) shows the maximum species
diversity.
2007
Q76
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
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.
A normal distribution
B.
a T-shaped curve
C.
A skewed curve
D.
A bi-modal distribution
Correct Answer: A
Explanation:
If the mean and the median pertaining to a
certain character of a population are of the same
value, a normal distribution is most likely to occur.
2007
Q77
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
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. What does this show ?
A.
The food plants mature and die at the end
of the rainy season
B.
The population of its predators increases
enormously
C.
Its population growth curve is of J-type
D.
S-shaped or sigmoid growth of this insect
Correct Answer: C
Explanation:
If a population (e.g reindeer population)
is allowed to grow in a predator free
environment, the population grows beyond
carrying capacity and there occurs population
crash due to sudden shortage of food. Such
growth curves also occur in insect populations
during rainy season, and in algal blooms.
2007
Q78
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Geometric representation of age structure is a characteristic of :-
A.
Biotic community
B.
Landscape
C.
Ecosystem
D.
Population
Correct Answer: D
Explanation:
The correct answer is Option D - Population.
Age structure refers to the distribution of individuals of different ages within a population. It can be represented geometrically using age pyramids (also known as population pyramids), which are graphical illustrations that show the distribution of various age groups in a population, typically with males on one side and females on the other. This distribution can give insights into the reproductive status, growth potential, and social dynamics of the population.
A biotic community (Option A) consists of all the living organisms in an area, often including a diverse range of species, where the age structure of each species would be considered separately rather than in aggregate.
Landscape (Option B) refers to a larger area that includes one or more ecosystems, encompassing both biotic and abiotic components. While age structure is relevant to the populations within the landscape, it isn't a characteristic that describes the landscape itself.
An ecosystem (Option C) is a community of living organisms in conjunction with the nonliving components of their environment (like air, water, and mineral soil), interacting as a system. While populations within the ecosystem have age structures, the ecosystem as a whole is characterized by energy flows and material cycles rather than the age structure of its constituent populations.
Population (Option D), however, is a group of individuals of the same species that live in the same area and interbreed, producing fertile offspring. The term "population" directly refers to the individuals to which age structure can be applied, making it the characteristic feature of a population among the options given.
2007
Q79
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
A high density of elephant population in an area
can result in :-
A.
Mutualism
B.
Interspecific competition
C.
Predation on one another
D.
Intraspecific competition
Correct Answer: D
Explanation:
It is competition between individuals of
same species. The intraspecific competition
may be very severe because all the members of
a species have similar requirements of food,
habitat mate, etc. and they also have similar
adaptations to get their needs.
2006
Q80
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Niche overlap indicates-
A.
Sharing of one or more resources between the
two species
B.
Mutualism between two species
C.
Active cooperation between two species
D.
Two different parasites on the same host
Correct Answer: A
Explanation:
Niche indicate the habitat of a particular
species and the interaction of that species with
the resources present in the habitat. Niche
overlap means that two or more species share
the resources present in a particular niche.
2006
Q81
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
The formula for exponential population growth is-
A.
dN/dt = rN
B.
dt/dN = rN
C.
rN/dN = dt
D.
dN/rN = dt
Correct Answer: A
Explanation:
Nearly all populations will tend to grow
exponentially as long as there are resources available.
The formula for exponential population growth is
dN/dt = rN. In this equation d is the rate of change,
N is the number of existing individuals, r is the
intrinsic growth rate, t is time, and dN/dt is the rate
of change in population size.
2005
Q82
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Which one of the following pairs in
mismatched ?
A.
Tundra - permafrost
B.
Savanna - acacia trees
C.
Prairie - epiphytes
D.
Coniferous forest - evergreen trees
Correct Answer: C
Explanation:
A biome is a major terrestrial community
characterized by a distinct climate and inhabited by a
particular species of plants and animals. Tundra is
characterized by precipitation of less than 25 cm
annually. Permafrost or permanent ice is found about
a meter down from the surface, it never melts and is
impenetrable to both water and roots. Savannahs are
open grasslands with scattered shrubs and trees.
Coniferous forest contain evergreen trees. In these
forests all plants do not shed their leaves at the same
time hence forest remains always evergreen. But
Prairies is a grassland and epiphytes and ephemerals
are found in deserts.
2005
Q83
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
At which latitude, heat gain through insolation
approximately equals heat loss through
terrestrial radiation -
A.
40o North and South
B.
42${1 \over 2} ^ o$ North and South
C.
66o North and South
D.
22${1 \over 2} ^ o$ North and South
Correct Answer: A
Explanation:
Earth does not receive equal radiation at
all points. The East West rotation of earth provides
equal exposure to sunlight but latitude and
dispersion do affect the amount of radiation received.
The poles receive far less radiation than equator.
This uneven heating is called differential insolation.
At 40º North and South, approximately the heat gain
is equal to heat loss through terrestrial radiation.
2005
Q84
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Animals have the innate ability to escape from
predation. Examples for the same are given
below. Select the incorrect example
A.
Poison fangs in snakes
B.
Enlargement of body size by swallowing air
in puffer fish
C.
Colour change in chameleon
D.
Melanism in moths
Correct Answer: A
Explanation:
Animals resist predation by cryptic
coloration deceptive marking, behavioural
defenses and possession of mechanical or
chemical defenses. Examples are
colour change in Chameleon
Enlargement of body size by swallowing air
in potter fish, Melanism in moths.
2005
Q85
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
More than 70% of world's fresh water is
contained in –
A.
Polar ice
B.
Greenland
C.
Antarctica
D.
Glaciers and Mountains
Correct Answer: A
Explanation:
Three fourth surface of earth is covered
by oceans which contain 97.5% of total water.
It is marine water with about 3.5% salt content
only 2.5% is fresh water which occurs on land.
Most of this water (1.97%) occurs as frozen
ice caps and glaciers, 0.5% fresh water occurs
as ground water. Rivers and lakes contain
0.02%, soil 0.01% while atmosphere possesses
0.001% of water as vapours.
2004
Q86
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
The maximum growth rate occurs in :-
A.
Exponential phase
B.
Stationary phase
C.
Senescent phase
D.
Lag phase
Correct Answer: A
Explanation:
Maximum growth rate occurs in exponential
or acceleration or log phase. The point at which the
exponential growth begins to slow down is known
as inflexion point.
2004
Q87
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
What is a keystone species ?
A.
A dominant species that constitutes a large
proportion of the biomass and which affects
many other species
B.
A species which makes up only a small
proportion of the total biomass of a
community, yet has a huge impact on the
community's organization and survival
C.
A common species that has plenty of
biomass, yet has a fairly low impact on the
community's organization
D.
A rare species that has minimal impact on
the biomass and on other species in the
community
Correct Answer: B
Explanation:
A keystone species is the one which
makes up only a small proportion of the
total biomass of a community, yet has a huge
impact on the community’s organization and
survival.
2004
Q88
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Certain characteristic demographic features of
developing countries are -
A.
High fertility, low or rapidly falling mortality
rate, rapid population growth and a very
young age distribution
B.
High mortality high density, uneven
population growth and a very old age
distribution
C.
High fertility, high density, rapidly rising
mortality rate and very young age distribution
D.
High infant mortality, low fertility, uneven
population growth and a very young age
distribution
Correct Answer: A
Explanation:
Demography is the study of population
in all aspects. Fertility refers to the number
of children per couple. Mortality rate is the
average number of natural deaths per unit
population per unit time. Age distribution
refers to the proportionate occurrence
of individuals of the three age groups.
Developing countries usually have high rate
of population growth, because of increasing
fertility and declining mortality.
2004
Q89
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
In which one of the following habitats does the
diurnal temperature of soil surface vary most ?
A.
Grassland
B.
Desert
C.
Shrub land
D.
Forest
Correct Answer: B
Explanation:
Desert show maximum difference
between day and night temperature.
2004
Q90
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
In which of the following pairs is the specific
characteristic of a soil not correctly matched ?
A.
Chernozems – Richest soil in the world
B.
Laterite – Contains aluminium compound
C.
Terra rossa – Most suitable for roses
D.
Black soil – Rich in calcium carbonate
Correct Answer: D
Explanation:
Black soil forms the largest group. It is
developed mainly on the Deccan traps of
Maharashtra, Madhya Pradesh and Kathiawar.
Because of its hydrology and climatic conditions of
the environment, the medium and deep black soils
are very suitable for cotton cultivation. Laterite soil
is rich in insoluble iron oxides and aluminium
compounds, which gives laterites a reddish
appearance. Chernozems are rich in nutrients (due
to abundant organic rich compounds) and
consequently the most fertile in the world.
2003
Q91
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Mycorrhiza is an example of :-
A.
Ectoparasitism
B.
Decomposers
C.
Endoparasitism
D.
Symbiotic relationship
Correct Answer: D
Explanation:
In mutalism or symbiosis both the
organisms in association are mutually benefitted and
further this association is obligatory, i.e., necessary
for existence of both organisms. Mycorrhiza is a
example of symbiosis. It is association between roots
of higher plants and fungal hyphae. The fungal
hyphae supply water and nutrients to the plant and
in turn get food form the plant. So both the organism
are mutually benefitted.
2002
Q92
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
What is true for individuals of same species ?
A.
Live in same habitat
B.
Live in different habitat
C.
Interbreeding
D.
Live in same niche
Correct Answer: C
Explanation:
Individuals of the same species can
interbreed. No two individuals share the
same ecological niche.
2002
Q93
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Two different species can not live for long duration
in the same niche or habitat. This law is : -
A.
Competitive exclusion principal
B.
Weiseman's theory
C.
Allen's law
D.
Gause's hypothesis
Correct Answer: D
Explanation:
Interspecific competition is rivalry
amongst members of different species. The severity
of competition depends upon similarity in the
requirement of food and shelter. Every type of
organism has a particular niche, no two organisms
can live in same niche. One of the two is eliminated.
This phenomenon is called Gause hypothesis of
competitive exclusion.
2002
Q94
NEET
MCQ
iCON Education HYD, 79930 92826, 73309 7282610 Mar 2026
Which type of association is found in between
entomophilous flower and pollinating agent ?
A.
Coperation
B.
Co-evolution
C.
Mutualism
D.
Commonsalism
Correct Answer: B
Explanation:
Co-evolution can occur in any
interspecific relationship like symbiosis or
mutualism. The relation between an entomophilous
flower and pollinating insect shows co-evolved
mutualism. In this the plant depends exclusively on
the insect for pollination and the insect relies on the
plant for food.
