Which of the following age pyramids show population with
almost equal number of pre-reproductive and reproductive
individuals and lesser individuals of old age group?
(a) (b)
(c) (d)
Organism living in subtropical and arctic zones respectively
are
(a) megatherms and microtherms
(b) hekistotherms and mesotherms
(c) mesotherms and microtherms
(d) mesotherms and hekistotherms.
Cardiac glycosides are produced by
(a) Calotropis (b) Acacia
(c) Nepenthes (d) Utricularia
Fleshy stem of Opuntia for storing water is
(a) chylocauly (b) chylophylly
(c) phylloclades (d) chylorhizy.
Stratification is the characteristic feature of
(a) tropical rain forest
(b) grassland
(c) temperate deciduous forest
(d) coniferous forest.
Which biome has permafrost conditions?
(a) Chapparal
(b) Savanna
(c) Temperate needle leaf
(d) Tundra
A specific place in an ecosystem, where an organism lives
and performs its functions is
(a) habitat (b) niche
(c) landscape (d) biome.
Read the following statements and fill blanks with correct
option.
(i) Hydathodes for excreting excess water in guttation
are present in .
(ii) Eichhornia possess .
(iii) Chalk glands are present in _____.
(i) (ii) (iii)
(a) mesophytes pneumatophores halophytes
(b) hygrophytes aerenchyma halophytes
(c) halophytes phraetophytes mangroves
(d) mesophytes aerenchyma xerophytes
Which of the given statements are correct for sigmoid
growth form?
(i) Population crashes due to mass mortality.
(ii) It occurs when resources are limited.
(iii) Population grows beyond carrying capacity.
(iv) It has four phases - lag, log, deceleration and steady.
(a) (i), (ii) and (iii) (b) (i) and (iv)
(c) (ii) and (iv) (d) (ii) and (iii)
13. Which among the following represents amensalism
interaction?
(a) Malarial parasite living in human RBCs.
(b) Penicillium inhibiting growth of Staphylococcus
bacterium.
(c) Entamoeba living in contact with host throughout
the life.
(d) Crocodile bird, helping crocodile to get rid of leeches
by entering the crocodile’s mouth.
14. Humus rich soil is
(a) loam soil (b) sandy soil
(c) clay soil (d) both (a) and (b).
15. Identify the correct sequence of ecological hierarchy starting
from lower to higher level.
(a) Population → Biotic community → Biome →
Landscape
(b) Landscape → Ecosystem → Biome → Biosphere
(c) Individual → Population → Landscape →
Ecosystem
(d) Biological community → Ecosystem → Landscape
→ Biome
16. Adaptations of parasite include
(i) Presence of adhesive organs.
(ii) Well developed reproductive organs.
(iii) Presence of complicated digestive system.
(iv) Loss of unnecessary organs.
(a) (i) and (iii) (b) (i), (ii) and (iv)
(c) (ii), (iii) and (iv) (d) (ii) and (iii)
17. Match the following.
Column I Column II
(i) Ostrich p. Restricted to narrow range
of salinity.
(ii) Shark q. Organism live within
narrow range of
temperature.
(iii) Salmon r. Can tolerate wide range of
salt concentration.
(iv) Polar bear s. Keep body temperature
constant despite variations
in ambient temperature.
(a) (i)-s, (ii)-p, (iii)-r, (iv)-q (b) (i)-p, (ii)-r, (iii)-s, (iv)-q
(c) (i)-r, (ii)-s, (iii)-q, (iv)-p (d) (i)-q, (ii)-p, (iii)-s, (iv)-r
18. Identify the correctly matched pair.
(a) Anadromous - Migration of Eel from freshwater
migration to sea for spawning.
(b) Mullerian - Resemblance of Monarch and
mimicry Queen butterfly, both
unpalatable.
(c) Diapause - Desert lizards moving to
burrows in soil to escape heat.
(d) Cold hardening - Polar bears develops
glycerol to lower freezing
point of body fluids.
