Both hydrarch and xerarch succession lead to .... .... [C.B.S.E. 2011]
75%
a) Medium water conditions
0%
b) Excessive wet conditions
25%
c) Xeric conditions
0%
d) Highly dry conditions
Q.2.
Abundance of species population within its habitat is .... .... [A.I.I.M.S.2002]
40%
a) Absolute density
20%
b)Regional density
20%
c) Relative density
20%
d) Niche density
Q.3.
An example of mutualism is .... .... [Bih.P.M.T. 1996]
0%
a) Riccia
25%
b) Selaginella
75%
c) Lichen
0%
d) Spirogyra
Q.4.
Which is not characteristic of intestinal symbionts? .... .... [C.E.T.Chd2000]
67%
a) Feeding on extra food for host
0%
b) Providing vitamins to host
33%
c) Anaerobic respiration
0%
d) Aerobic respiration
Q.5.
The size of clay particles is .... ..... [ DPMT 2008]
67%
a) Less than 0.002 mm
33%
b) More than 0.002 mm
0%
c) 0.2 mm to 2 mm
0%
d) None of the above
Q.6.
Birth rate is 100, death rate isNumbers of individual in population group isWhat is the percentage of natural growth rate? .... .... [Guj.C.E.T.2006]
67%
a) 0.09%
33%
b) 9.0%
0%
c) 0.9%
0%
d) 90%
Q.7.
Which of the following is wrongly matched? .... .... [Kerala 2005]
67%
a) Temperature zone 20 - 40 latitude
0%
b) Hypolimnion - Thermal stratification in lakes
0%
c) Ozone layer - Stratosphere
33%
d) Profundal zone - Dark zone
Q.8.
The factor related to structure of earth surface is ..... .... [B.H.U.1995]
33%
a) Edaphic
33%
b) Biotic
0%
c) Temperature
33%
d) Topographic
Q.9.
Stronger homeostasis in an ecosystem refers to .... .... [C.E.T.Chd2009]
67%
a) self regulatory mechanism
0%
b) Feed back mechanism
0%
c) Influence of productivity
33%
d) State of equilibrium
Q.10.
What does the following sequences represent: Blue → Green algae → Crustose→ Lichens → Foliose lichens → Mosses → Shrubs → Dicotyledonous trees? [C.P.M.T. 1989]
33%
a) A food pyramid
67%
b) Ecological succession
0%
c) Genetic drift
0%
d) Phylogenetic trend
Q.11.
Carrying capacity is determined by .... .... [Odisha 2009]
100%
a) Limiting resources
0%
b) Mortality rate
0%
c) Natality rate
0%
d) Predation
Q.12.
Keystone species is .... .. [ AIIIMS 2007]
0%
a) Always dominant
67%
b) Useful in maintain structure and function of biotic community
0%
c) With maximum biomass
33%
d) All the above
Q.13.
Plants and animals living in a particular area constitute .... .... [C.P.M.T. 1998]
50%
a) Flora and fauna
25%
b) Community
25%
c) Ecosystem
0%
d) Ecology
Q.14.
Plants obtaining nourishment from other plants by haustoria are .... .... [Har.PM.T. 1998]
33%
a) Epiphytes
67%
b) Parasites
0%
c) Xerophytes
0%
d) Halophytes
Q.15.
Maximum survival and reproductive capacity shown by a population under optimal conditions is .... ..... [J.K.C.M.E.E. 2011]