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Organisms And The Environment Mcq
Quiz 13
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Q.1
Select the correct answers for "P" and "Q" P. Many organs of aquatic plants float in water Q. Large air gaps occur in the collenchymatous tissue K.C.E.T. 2011
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a) Q is correct, P is wrong
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b) P is correct, Q is wrong
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c) Both P are Q is correct
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d) Both P are Q is wrong
Explanation
Answer : (b)
Q.2
Lichen is pioneer in succession .... .... [R.P.M.T. 2011]
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a) Hydrosere
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b) Lithosere
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c) Psammosere
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d) Xerosere
Explanation
Answer : (b)
Q.3
Shallow lakes with abundant organic matter are .... .... [B.H.U.2002]
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a) Saprotrophic
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b) Oligotrophic
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c) Eutrophic
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d) Heterotrophic
Explanation
Answer : (c)
Q.4
Littoral zone is found along .... .... [D.P.M.T. 2011]
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a) High mountain
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b) Sea
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c) River
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d) Desert
Explanation
Answer : (b)
Q.5
Warm blooded animals of cold climate have small extremities. This was stated by .... .... [C.E.T.Chd.2006]
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a) Bergman
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b) Gloger
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c) Dollo
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d) Allen
Explanation
Answer : (d)
Q.6
Micro-organisms having optimum temperature for growth below 15° C which cannot grow above 20° C are called .... .... [A.M.U.P.M.D.C.2006]
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a) Mesophiles
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b) Thermophiles
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c) Psychrophiles
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d) None of the above
Explanation
Answer : (c)
Q.7
Soil rich in Fe and Al due to excessive leaching is .... .... [D.P.M.T.2002]
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a) Alluvial
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b) Laterite
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c) Loam
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d) Both A and B
Explanation
Answer : (b)
Q.8
Phytoplankton are dominant in ..... ..... [D.P.M.T.2011]
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a) Limnetic zone
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b) Profundal zone
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c) Littoral zone
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d) Benthic zone
Explanation
Answer : (c)
Q.9
Feature of xerophytic leaves is .... .... [Odisha 2011]
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a) Waxy cuticle
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b) Sunken stomata on upper epidermis
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c) Large surface area
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d) Leathery surface
Explanation
Answer : (b)
Q.10
Most populous country of the world is .... .... [M.H.T.C.E.T.2008]
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a) Bangladesh
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b) Indonesia
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c) India
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d) China
Explanation
Answer : (d)
Q.11
Consequences of population explosion were explained for the first time by ..... ..... [M.H.T.C.E.T. 2009]
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a) Darwin
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b) De Vries
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c) Lamarck
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d) Malthus
Explanation
Answer : (d)
Q.12
Study of inter-relationships between groups of organisms/an entire community and its environment is .... .... [B.H.U.1990]
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a) Autecology
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b) Resource ecology
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c) Species ecology
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d) Synecology
Explanation
Answer : (d)
Q.13
What is correct .... .... [A.I.I.M.S. 2011]
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a) Natural selection is responsible for extinction of dinosaurs
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b) Lion and leopard have convergent evolution
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c) Homo habilis and Homo erectus are closely related
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d) Biston betularia shows cryptic camouflage
Explanation
Answer : (d)
Q.14
Ozone protects biosphere from high energy .... .... [D.P.M.T.2005]
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a) Infra-red rays
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b) Ultraviolent rays
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c) X-rays
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d) Gamma rays
Explanation
Answer : (b)
Q.15
Phase of population growing having equal natality and mortality is .... .... [Wardha 2003]
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a) Lag phase
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b) Plateau phase
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c) Exponential phase
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d) Log phase
Explanation
Answer : (b)
Q.16
Halophytes occur in .... .... [C.P.M.T. 2009]
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a) Salty soil
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b) Desert
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c) Near river
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d) Rainy water
Explanation
Answer : (a)
Q.17
Sigmoid curve is .... ..... [Wardha 2002]
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a) Rate of transpiration
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b) Rate of respiration
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c) Rate of photosynthesis
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d) Growth of population
Explanation
Answer:(b)
Q.18
A successful parasite is the one which .... .... [A.F.M.C.2000]
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a) Grows rapidly
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b) Reproduces fast
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c) Sticks to host for long
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d) Makes minimum demands from its host
Explanation
Answer : (d)
Q.19
Animals have shorter and smaller extremities in colder areas. It is .... .... [J.I.P.M.E.R.2000]
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a) Allen's law
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b) Cope's law
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c) Dollo's law
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d) Bergman's law
Explanation
Answer : (a)
Q.20
Psammophytes are plants growing on soil .... .... [M.P.P.M.T. 2007]
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a) Alluvial
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b) Sandy
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c) Alkaline
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d) Acidic
Explanation
Answer : (b)
Q.21
A condition in which body's internal environment remains relatively constant within limits is .... .... [Chd. C.E.T. 2012]
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a) Hematoma
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b) Haemopoiesis
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c) Homeostasis
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d) Hemostasis
Explanation
Answer : (c)
Q.22
In a population of 1000 individuals360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is : .. [AIPMT 2014]
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a) 0.6
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b) 0.7
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c) 0.4
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d) 0.5
Explanation
Answer:(a)
Q.23
f 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain ? …[AIPMT 2014] plant → mice → snake → peacock
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a) 0.2 J
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b) 0.0002 J
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c) 0.02 J
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d) 0.002 J
Explanation
Answer:( c)
Q.24
A species facing extremely high risk of extinction in the immediate future is called: ….[AIPMT 2014]
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a) Critically Endangered
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b) Extinct
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c) Vulnerable
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d) Endemic
Explanation
Answer:(a)
Q.25
Match the following and select the correct option : ….[AIPMT 2014]
(a)Earthworm
(i) Pioneer species
(b) Succession
(ii)Detritivore
(c) Ecosystem service
(iii)Natality
(d) Population growth
(iv)Pollination
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a) a → (iii); b → (ii); c → (iv); d → (i)
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b) a → (ii); b →(i); c →(iv); d → (iii)
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c) a → (i); b →(ii); c →(iii); d →(iv)
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d) a → (iv) b →(i) c →(iii); d →(ii)
Explanation
Answer:(b)
Q.26
Vertical distribution of different species occupying different levels in a biotic community is known as : …[AIPMT 2015]
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a) Pyramid
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b) Divergence
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c) Stratification
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d) Zonation
Explanation
Answer:(c)
Q.27
Which one of the following statements in not true? …[AIPMT 2015]
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a) Honey is made by bees by digesting pollen collected from flowers
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b) Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups
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c) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people
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d) The flowers pollinated by flies and bats secrete foul odour to attract them
Explanation
Honey starts as flower nectar collected by bees, which gets broken down into simple sugars stored inside the honeycomb. The design of the honeycomb and constant fanning of the bees' wings causes evaporation, creating sweet liquid honey. Honey's color and flavor varies based on the nectar collected by the bees.thus statement of option "a" is not true Answer:(a)
Q.28
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: …[AIPMT 2015]
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a) Population A consumed the members of population B
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b) Both plant populations in this habitat decreased
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c) Population B competed more successfully for food than population A
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d) Population A produced more offspring than population B
Explanation
Answer:(c)
Q.29
Most animals are tree dwellers in a: …[AIPMT 2015]
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a) tropical rain forest
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b) coniferous forest
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c) thorn woodland
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d) temperate deciduous forest
Explanation
Answer:(a)
Q.30
Gause's principle of competitive exclusion states that : …[AIPMT-2016]
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a) More abundant species will exclude the less abundant species through competition.
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b) Competition for the same resources excludes species having different food preferences.
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c) No two species can occupy the same niche indefinitely for the same limiting resources.
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d) Larger organisms exclude smaller ones through competition.
Explanation
Answer:(c)
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