Population is a group of individuals of the same species inhabitirig the same area It is characterised by parameters like density, natality, mortality, age distribution, biotic potential etc. This chapter deals with the growth, and measurement of population and the different interactions among species.
5. The direct food relation between two species of ani¬mals in which one animal kills and eats up the other animal is referfed to as
(a) predation (b) scavenging
(c) parasitism (d) arnrnensalism
6. If in &population, the. rate of addition of new members is higher than the rate of loss of individuals, the graph prepared shows:
(a) declined growth (b) exponential growth
(c) zero population growth (d) steady state
7 In a biotic community, which of the following is a pro¬tective device?
(a) symbiosis (b) mimicry
(c) parasitism (d) commensalism
8. Which of the following is an example of stem parasite? (a) Santalum and Loranthus (b) Cassytha and Cuscuta (c) Loranthus and Viscum (d) Both b and c
9. Which of the following is not an insectivorous plant?
(a) Dionoea (b) Drosera
(c) Trapa (d) Nepenthes
10. A community is an aggregation of
(a) individuals of different kinds
(b) population of the same type
(c) individuals of a population
(d) individuals of the same kind
1 . Ecads are
(a) genetically dissimilar and producing viable offspring
(b) genetically dissimilar and producing variable offspring
(c) genetically similar and producing viable offspring
(d) genetically dissimilar and not producing viable off¬spring
12. Vanda is an example of
(a) root parasite (b) stem parasite
(c) hydrophyte (d) epiphyte
13. The protective mechanism shown by praying mantis is
(a) camouflage (b) mimicry
(c) symbiosis (d) competition
14. The relationship, between sucker fish and shark is
(a) protocooperation (b) commensalism
(c) parasitism (d) mutualism
Answer Key
1. (a) 2. (b)
8. (d) 9. (c) 3. (a) 4. (b) 5. (a) 6. (b) 7. (d)
10.(a) 11. (c) 12. (d) 13. (a) 14. (b)
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