1. The mycorrhiza is an example of
( A ) Symbiotic interaction
( B ) Ectoparasite
( C ) Endoparasite
( D )Decomposer
Answer-( A )
2. Lichen is the association of
( A ) Algae & algae
( B ) Algae & fungi
( C ) Algae & higher plant roots
( D ) Fungi & fungi
Answer-( B )
3. The region of atmosphere near the earth is called
( A ) Stratosphere
( B ) Mesosphere
( C )Trophosphere
( D )Thermosphere
Answer-( C )
4. Which in the following has highest number of species?
( A ) Birds
( B ) Angiosperms
( C )Fungi
( D ) Insects
Answer-( D )
5. Hibernation occuring in certain animal is :
( A ) Rhythmic
( B ) Periodic
( C ) Occasional
( D ) Intermittent
Answer-( B )
6. Number of deaths during a limited time period and place for a particular population is known as
( A ) Natality
( B ) Mortality
( C ) Migratory
( D ) Integrity
Answer-( B )
7. Climax community is present in which area ?
( A ) In equilibrium
( B ) In transition
( C ) Bare land
( D ) None of these
Answer-( A )
8. The maximum number of species has been extincted from :
( A ) islands
( B ) mainland
( C ) oceans
( D ) fresh water bodies
Answer-( A )
9. Loss of relative biological equilibrium is due to :
( A ) low temperature
( B ) high temperature
( C ) radiation
( D ) pollution
Answer- ( D )
10. The value of Biological potency is measured by
( A ) Birth rate Death rate
( B ) Birth rate + Death rate
( C ) Birth rate : Death rate
( D ) None of above
Answer-( A )
11. The bacteria Rhizobium present in soil in which way take part in the population growth of plants ?
( A ) By Nitrogen-fixation & increase in soil fertility.
( B ) By Fungal roots
( C ) By commensalism
( D ) None
Answer-( A )
12. The shallow-water region near by Pond is called
( A ) Littoral zone
( B ) Limnetic zone
( C ) Profundal zone
( D ) Benthic zone
Answer-( A )
13. Animal that can tolerate water loss equal to one third body weight is :
( A ) Necturus
( B ) Camel
( C ) Lizard
( D) Chiton
Answer-( B )
14. In commensalism :
( A ) Both partners are benefitted
( B ) Both partners are harmed
( C ) Weaker is benefitted while stronger is unharmed
( D ) None of the above
Answer-( C )
15. A successful parasite is the one which :
(A) Grows rapidly
(B) Reproduces fast
(C) Sticks to host for long
(D) Makes minimum demands from its host
Answer-( D )
16. Which in the following has root cap?
( A ) Xerophyte
( B ) Mesophyte
( C ) Hydrophyte
( D) Hallophyte
Answer-( C )
17. Unrestricted reproductive capacity is:
( A ) Birth rate
( B ) Carrying capacity
( C ) Biotic potentiality
( D ) Fertility
Answer-( C )
18. One who secures food at the cost of others is :
( A ) Parasite
( B ) Insectivore
( C ) Commensal
( D ) Saprophyte
Answer-( D )
19. Frog feeding on herbivorous insect is:
( A ) Primary consumer
( B ) Secondary consumer
( C ) Tertiary consumer
( D ) Top carnivore
Answer-( B )
20. Mutualism occurs between :
( A ) Butterfly and flower
( B ) Escherichia coli and man
( C ) Zoochlorellae and Hydra
( D ) Hermit Crab and Sea Anemone
Answer-( C )
21. The maximum growth rate is in
( A ) Senescent phase
( B ) lag phase
( C ) Exponential phase
( D ) Stationary phase
Answer-( C )
