Post on 16-Jul-2016
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WELCOMEENVIRONMENT QUIZ
1. Nitrogen Gas returns to the atmosphere by the action of
Denitrifying
bacteriaNitrogen fixing
bacteria
Nitrate Fertilizer ammonia
2. A molecule of nitrogen which you have just breathed in,may have been part of a dinosaur that lived million years ago . This illustrates the principle that
Dead animal may be fossilized Molecules of cytoplasm may be replaced by
oganic salts
Decay bacteria cycle element
Nitrogen does not combine readily with other element
Nitrogen forms part of the protiens of plants and animals
3. The sequence of energy flow through a food chain is
Primary consumers – producers – higher order consumers
Producers – higher order consumers - Primary consumers
Primary consumers - Higher order consumers –Producers
Higher order consumers - Primary consumers - Producers
Producers - Primary consumers - Higher order consumers
4. In a terristrial ecosystem , the tropic level that would contain the largest biomass would contain the largest biomass would be the
producer Primary consumers
decomposersSecondary comsumers
5. A carrot plant is exposed to carbondioxide containing radioactive carbon for 24 hr . After this exposure ,the carrot roots are found to be radioactivity . These carrots are then fed to rabbit . One week later,the rabitts tissue tested for radioactivity and is found to have a higher then normal background count . Which biogeochemical cycle is apparent from this study ?
Oxygen Carbon
NitrogenWater
6. The rate of growht of a natural population
Always reaches the carrying capacity of the ecosystem
Is limited the carrying capacity of the ecosystem
Exceeds the death rate and migration rate
When graphed,always has a positive slope
7. In the past decade,which of the following has NOT been a major cause of the increase in the world population.
Longer life span Lower infant mortality
Improved santination
Increase in birth rate
8. Which one of the following has not a functional unit in ecosystem ?
Productivity Decomposation
StratifactionEnergy Flow
9. The upright pyramid of number is absent in
Lake Grassland
ForestPond
10. Which only of the following is not a gaseous biochemical cycle in ecosystem ?
Nitrogen cycle Carbon cycle
Sulphur cyclePhosphorus cycle
11. Given below is an imaginary pyramid of numbers. What could be one of the possiblities about certain organisms at some of the different levels ?Level one PP is “pipal trees” and the level SC
“sheep”Level one PC is “rats”
and the level SC “cats”
Level PC is “insects” and level SC is “small
insectivorous birds”
Level one PP is “hytoplanktons” in sea
and “whale” on top level TC
12. Identify the possible link “A” in the following food chainPlant insect frog “A” Eagle
Wolf Parrot
CobraRabbit
13. The type of ecosystemwith the highest mean plant productivity is :
Tropical Rain Forest
Temprate Grassland
TundraDesert
14. In an aquatic ecosystem,the tropic level equivalent to cows in grasslands is :
Zooplankton Nekton
BenthosPhytoplankton
15. The final stable community in ecological succession is _________
Climax Sere
CarnivoresPioneers
16. An ecosystem which can be easily damaged but can recover after some time if damageing effect stops will be having ________________ .
Low Stability and high resilience
Low Stability and low
resilience
High Stability and high resilience
High Stability and low
resilience
17. Typical levels in ecosystem is formed by ____
Only Herbivores Only Plants
Organisms linked in food
chainOnly Bacteria
18. “Complete competitors cannot coexist” is true for ...
Primary succession Secondary seccession
Charecter Displacement
Competitive exclusion
19. Bell shaped polygonal pyramid indicates
Moderate Percentage of yonger youth
Low Percentage of yonger youth
Low Percentage of older youth
High Percentage of yonger youth
20. Theage of pyramid with board base indicates
Moderate Percentage of yonger youth
Low Percentage of yonger youth
Low Percentage of older youth
High Percentage of yonger youth
21. Which one of the following ecosystem types has the highest annual net primary productivity ?
Tropical
deciduous forest
Temperate deciduous
forestTemperate evergreen
forestTropical rain
forest
22. A renewable exhaustible natural resource is :
Petroleum Coal
ForestMinirals
23. When the two ecosystems overlap each other,the area is called ............
Habitat Ecotone
EcotypeNiche
24. Which of the following ecosystem type has the highest annual net primary productivity ?
Grasslands Mangroves
Coral reefEquatorial rain forest
25. In ___ Food Chain, Dead Organic Matter is serve as Principle energy input ….
Detritivores Producers
Producers and detritivores Non of this
26. Which of the following is correctly matched ?
Butterfly-camouflage
House lizard - autotomy
All of the abovegarden lizard -mimicry
27. consider the following list of factors
Soil Water
dispersal Air
28. About 70% of total global carbon is found in
Forest River
OceanLand and desert
29. Which of the animals may occupy more than one trophic levels in the same ecosystem at the same time ?
Goat Crow
LionSparrow
30. Which of the following statement is correct for secondary succession ?
It is similar to primary succession except that it has a relatively fast pace
Both
Non of the above
It occurs on a deforested site
31. Total amount of living material at he various trophic levels of a food chain is depicted by pyramids of
Biomass Number
All of the aboveHumans
RIGHT ANSWER
AFSOSSS!!!WRONG ANSWER
Thank You