JEENEET KOTA CLASSES1. Plant succession occurring in a sandy area is

a) psammosere b) hydrosere c) halosere d) lithosere2. A community that starts the process of succession in a habitat is called

a) pioneer community b) seral communityc) climax community d) ecotonal community

3. If there was no CO2 in the earth’s atmosphere the temperature of earth’s surface would bea) same as present b) less than presentc) higher than present d) depends upon amount of O2

4. In ecosystem the insectivorous plants are placed ina) herbivorous b) primary producers c) predators d) none correct

5. Bacteria have been classified ina) trophic level -1 b) trophic level -2 c) trophic level -3and 4 d) all correct

6. Primary productivity is measured in terms of a) kg per m2 per yr b) g per m2 per yrc) tonnes per hectare per yr d) all correct

7. Osmotrophs belong toa) primary consumers b) secondary consumersc) top carnivores d) decomposers

8. Limnology is related toa) study of fresh waters b) grasslands c) oceanography d) epiphytic plants

9. Both the zebra and African lion live in the tropical grasslands but occupy different a) biospheres b) environments c) ecological niches d) habitats

10. Which one of the following components of ecosystem comes from outside?a) oxygen b) energy c) lnsects d) producers

11. In a terrestrial ecosystem (e.g., forest) maximum energy is in which trophic level?a) T1 b) T2 c) T3 d) T4

12. In the phosphorus cycle, weathering makes phosphate available first toa) producers b) decomposers c) consumes d) none of these

13. Treeless terrestrial biome of cold climate isa) taiga b) savannah c) tundra d) plankton

14. In grass deer tiger food chain grass biomass is one tonne. The tiger biomass shall bea) 100 kgs b) 10 kgs c) 200 kgs d) 1 kgs

15. Amount of energy transferred from one trophic level to next isa) 1.5% b) 10% c) 15% d) 20%

16. A detrivore isa) animal feeding on decaying organic matter c) animal feeding on plant matterb) animal feeding on another animal d) a plant feeding on an animal

17. Putrefying organisms area) producer organisms b) reducer organismsc) consumer organisms d) parasitic organisms

18. Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?a) less than 1% b) 2-10% c) 30% d) 50%

19. The units to express primary production isa) kcalm-2yr-1 b) gm-2 c) gm-2yr-1 d) kcalm-1

20. All favour the process of decomposition excepta) sugar rich detritus b) absence of oxygenc) warm temperature d) no exception as all given factors favours it

21. In a terrestrial ecosystem the large fraction of energy flows througha) detritus food chain b) grazing food chain c) herbivores d) carnivores

22. Chose how many out of the given list are omnivores – Rabbit; Sparrow; Hydra; Crow; Man; Fox; Cockroach; Bobcata) three b) six c) five d) four

23. All are true for ‘climax community’ except a) rapidly keeps on changing to reach equilibrium b) final communityc) end of succession d) stable

24. Lichen is pioneer in succession ofa) hydrosere b) lithosere c) psammosere d) xerosere

25. Which one of the following type of organisms occupy more than one trophic level in a pond ecosystem?a) zooplankton b) frog c) phytoplankton d) fish

26. The plants convert light into chemical energy with a photosynthetic efficiency ofa) 3-6% b) 6-20% c) 20-35% d) 35-41%

27. What is the percentage of photosynthetically active radiation (PAR) in the incident solar radiation?a) 100% b) 50% c) 1 – 5% d) 2 – 10%

28. Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?a) Sparrow b) lion c) goat d) frog

29. Top consumer (A) (A) 10 kcal/m2/yr

Primary consumer (B) (B) 100 kcal/m2/yr

Primary producer (C) (C) 1,000 kcal/m2/yr

Solar radiation (D) (D) 1,00,000 kcal/m2/yr

In the above energy pyramid for an ecosystem the rate of secondary production is

a) uncertain b) 100 kcal/m2/yr c) 10 kcal/m2/yr d) 110 kcal/m2/yr

30. Top consumer (A) (A) 10 kcal/m2/yr

Primary consumer (B) (B) 100 kcal/m2/yr

Primary producer (C) (C) 1,000 kcal/m2/yr

Solar radiation (D) (D) 1,00,000 kcal/m2/yr

Refer to the above diagram of energy pyramid the ecological efficiency at primary consumer level, in comparison to that at secondary consumer level is

a) same b) more c) less d) can not be ascertained from the data