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
  • a) Q is correct, P is wrong
  • b) P is correct, Q is wrong
  • c) Both P are Q is correct
  • d) Both P are Q is wrong
Q.2
Lichen is pioneer in succession .... .... [R.P.M.T. 2011]
  • a) Hydrosere
  • b) Lithosere
  • c) Psammosere
  • d) Xerosere
Q.3
Shallow lakes with abundant organic matter are .... .... [B.H.U.2002]
  • a) Saprotrophic
  • b) Oligotrophic
  • c) Eutrophic
  • d) Heterotrophic
Q.4
Littoral zone is found along .... .... [D.P.M.T. 2011]
  • a) High mountain
  • b) Sea
  • c) River
  • d) Desert
Q.5
Warm blooded animals of cold climate have small extremities. This was stated by .... .... [C.E.T.Chd.2006]
  • a) Bergman
  • b) Gloger
  • c) Dollo
  • d) Allen
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]
  • a) Mesophiles
  • b) Thermophiles
  • c) Psychrophiles
  • d) None of the above
Q.7
Soil rich in Fe and Al due to excessive leaching is .... .... [D.P.M.T.2002]
  • a) Alluvial
  • b) Laterite
  • c) Loam
  • d) Both A and B
Q.8
Phytoplankton are dominant in ..... ..... [D.P.M.T.2011]
  • a) Limnetic zone
  • b) Profundal zone
  • c) Littoral zone
  • d) Benthic zone
Q.9
Feature of xerophytic leaves is .... .... [Odisha 2011]
  • a) Waxy cuticle
  • b) Sunken stomata on upper epidermis
  • c) Large surface area
  • d) Leathery surface
Q.10
Most populous country of the world is .... .... [M.H.T.C.E.T.2008]
  • a) Bangladesh
  • b) Indonesia
  • c) India
  • d) China
Q.11
Consequences of population explosion were explained for the first time by ..... ..... [M.H.T.C.E.T. 2009]
  • a) Darwin
  • b) De Vries
  • c) Lamarck
  • d) Malthus
Q.12
Study of inter-relationships between groups of organisms/an entire community and its environment is .... .... [B.H.U.1990]
  • a) Autecology
  • b) Resource ecology
  • c) Species ecology
  • d) Synecology
Q.13
What is correct .... .... [A.I.I.M.S. 2011]
  • a) Natural selection is responsible for extinction of dinosaurs
  • b) Lion and leopard have convergent evolution
  • c) Homo habilis and Homo erectus are closely related
  • d) Biston betularia shows cryptic camouflage
Q.14
Ozone protects biosphere from high energy .... .... [D.P.M.T.2005]
  • a) Infra-red rays
  • b) Ultraviolent rays
  • c) X-rays
  • d) Gamma rays
Q.15
Phase of population growing having equal natality and mortality is .... .... [Wardha 2003]
  • a) Lag phase
  • b) Plateau phase
  • c) Exponential phase
  • d) Log phase
Q.16
Halophytes occur in .... .... [C.P.M.T. 2009]
  • a) Salty soil
  • b) Desert
  • c) Near river
  • d) Rainy water
Q.17
Sigmoid curve is .... ..... [Wardha 2002]
  • a) Rate of transpiration
  • b) Rate of respiration
  • c) Rate of photosynthesis
  • d) Growth of population
Q.18
A successful parasite is the one which .... .... [A.F.M.C.2000]
  • a) Grows rapidly
  • b) Reproduces fast
  • c) Sticks to host for long
  • d) Makes minimum demands from its host
Q.19
Animals have shorter and smaller extremities in colder areas. It is .... .... [J.I.P.M.E.R.2000]
  • a) Allen's law
  • b) Cope's law
  • c) Dollo's law
  • d) Bergman's law
Q.20
Psammophytes are plants growing on soil .... .... [M.P.P.M.T. 2007]
  • a) Alluvial
  • b) Sandy
  • c) Alkaline
  • d) Acidic
Q.21
A condition in which body's internal environment remains relatively constant within limits is .... .... [Chd. C.E.T. 2012]
  • a) Hematoma
  • b) Haemopoiesis
  • c) Homeostasis
  • d) Hemostasis
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]
  • a) 0.6
  • b) 0.7
  • c) 0.4
  • d) 0.5
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
  • a) 0.2 J
  • b) 0.0002 J
  • c) 0.02 J
  • d) 0.002 J
Q.24
A species facing extremely high risk of extinction in the immediate future is called: ….[AIPMT 2014]
  • a) Critically Endangered
  • b) Extinct
  • c) Vulnerable
  • d) Endemic
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
  • a) a → (iii); b → (ii); c → (iv); d → (i)
  • b) a → (ii); b →(i); c →(iv); d → (iii)
  • c) a → (i); b →(ii); c →(iii); d →(iv)
  • d) a → (iv) b →(i) c →(iii); d →(ii)
Q.26
Vertical distribution of different species occupying different levels in a biotic community is known as : …[AIPMT 2015]
  • a) Pyramid
  • b) Divergence
  • c) Stratification
  • d) Zonation
Q.27
Which one of the following statements in not true? …[AIPMT 2015]
  • a) Honey is made by bees by digesting pollen collected from flowers
  • b) Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups
  • c) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people
  • d) The flowers pollinated by flies and bats secrete foul odour to attract them
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]
unit-10_ch-3_que_no-392_img_no1.png
  • a) Population A consumed the members of population B
  • b) Both plant populations in this habitat decreased
  • c) Population B competed more successfully for food than population A
  • d) Population A produced more offspring than population B
Q.29
Most animals are tree dwellers in a: …[AIPMT 2015]
  • a) tropical rain forest
  • b) coniferous forest
  • c) thorn woodland
  • d) temperate deciduous forest
Q.30
Gause's principle of competitive exclusion states that : …[AIPMT-2016]
  • a) More abundant species will exclude the less abundant species through competition.
  • b) Competition for the same resources excludes species having different food preferences.
  • c) No two species can occupy the same niche indefinitely for the same limiting resources.
  • d) Larger organisms exclude smaller ones through competition.
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