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12th Biology Monthly Test - 1 ( Botany - Ecosystem )

St. Britto Hr. Sec. School - Madurai

12th Biology Monthly Test - 1 ( Botany - Ecosystem )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Significance of food web is / are

it does not maintain stability in nature
it shows patterns of energy transfer
it explains species interaction
b and c

_____________is a lentic ecosystem.

pond
stream
seas
rivers

Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?

Frog
crow
Lion
Goat

PAR is between the range of

400-600 nm
300 - 600 nm
400- 700 nm
200- 700 nm

TDF stands for ________

Tropical dry evergreen forests
Total dry evergreen forests
Tamilnadu dry evergreen forests
Throughout dry evergreen forests

Secondary succession takes place on/in

bare rock
degraded forest
newly created pond
barren lands

Which of the following is expected to have the highest value (gm^-2yr^-1) in a grassland ecosystem?

Tertiary production
Gross production
Net production
Secondary production

If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?

Plant \(\rightarrow\) Mice \(\rightarrow\) Snake \(\rightarrow\) Peacock

0.02 J
2.5 J
5 J
0.0002 J

Which of the following is / are not the mechanism of decomposition?

Eluviation
Catabolism
Anabolism
Fragmentation

Ten percent law was proposed by ____________

Elton
Thienemann
Lindeman
Odum

Identify the possible link "A" in the following food chain
Plant \(\rightarrow\) Insect \(\rightarrow\) Frog \(\rightarrow\) "A" \(\rightarrow\) Eagle

Cobra
Parrot
Rabbit
Eagle

Profundal zone is predominated by heterotrophs in a pond ecosystem, because of

with effective light penetration
no effective light penetration
complete absence of light
a and b

Which one of the following is called artificial ecosystem

Rice field
Maize field
Pond
Both a and b

Pond ecosystem is

not self sufficient and self regulating
partially self sufficient and self regulating
self sufficient and not self regulating
self sufficient and self regulating

Which of the following are not regulating services of ecosystem services?

(i) Genetic resources '
(ii) Recreation and aesthetic values
(iii) Invasion resistance
(iv) Climatic regulation

i and iii
ii and iv
i and ii
i and iv

Part - B

Generic 2 - Answer All Question

Draw a food web.

What is detritus food chain?

What will happen if all producers are removed from ecosystem?

Name the common .plants present in fresh water swamp forests.

What are consumers?

How did odum define 'ecosystem'?

How many types of forest vegetation are seen in India?

Pyramid of energy is always upright. Give reasons

What are producers?

What are autotrophs?

Write the name of two major components of Ecosystem.

Productivity of profundal zone will be low. Why?

What is a flagship species?

Discuss the gross primary productivity is more efficient than net primary productivity.

Define decomposition.
Define productivity.

Part - C

Generic 3 - Answer All Question

Shape of pyramid in a particular ecosystem is always different in shape. Explain with example.

What is plant succession?

List the anthropogenic activities which affect ecosystem.

List the benefits of Mangroves ecosystem services.
What is the significance of food web?

What is food-web?

List the causes of succession.

Give the outline classification of plant succession.

Write about the factors affecting primary productivity.

What are blue carbon ecosystem?

Write the types of Carbon.

Part - D

Generic 5 - Answer All Question

Explain in detail about "First law of thermodynamics".

Various stages of succession are given below. From that rearrange them accordingly. Find out the type of succession and explain in detail. Reed-swamp stage, phytoplankton stage, shrub stage, submerged plant stage, forest stage, submerged free floating stage, marsh medow stage.

Various stages of succession are given bellow. From that rearrange them accordingly. Find out the type of succession and explain in detail.
Reed-swamp stage, phytoplankton stage, shrub stage, submerged plant stage, forest stage, submerged free floating stage, marsh medow stage.
Write a note on the types of succession.

Generally in summer the forest are affected by natural fire. Over a period of time it recovers itself by the process of successions .Find out the types of succession and explain.

Shape of pyramid in a particular ecosystem is always different in shape. Explain with example.

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