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

St. Britto Hr. Sec. School - Madurai

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

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

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

Which of the following ecosystem has the highest primary productivity?

Pond ecosystem
Lake ecosystem
Grassland ecosystem
Forest ecosystem

Plants such as Albizzia, Acacia and Capparis are the examples of tropical

Grass lands
thorn forests
decidiuous forests
evergreen forests

Which of the following is I are not a natural ecosystem?

Forest ecosystem
Rice field
Grassland ecosystem
Desert ecosystem

Pond is a type of

forest ecosystem
grassland ecosystem
marine ecosystem
fresh water ecosystem

Which of the following is / are not a natural ecosystem?

Forest ecosystem
Rice field
Grassland ecosystem
Desert ecosystem

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

About 70% of total global carbon is found in

Forests
grasslands
agroecosystem
Oceans

PAR is between the range of

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

Which one of the following organism occupies more than one trophiclevel in a pond ecosystem?

Fish
Zooplankton
Frog
Phytoplankton

Part - B

Generic 2 - Answer All Question

Define oceanography.

What are Anthropogenic grasslands?

What is a food chain?
Defme Limnology.

What is biogeochemical cycle?

What are producers?

Part - C

Generic 3 - Answer All Question

What is plant succession?

What are blue carbon ecosystem?

List the benefits of Mangroves ecosystem services.
Write the difference between Macro consumers and Micro consumers.

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

How are aquatic ecosystem classified?

Part - D

Generic 5 - Answer All Question

Generally human activities are against to the ecosystem, where as you a student how will you help to protect ecosystem?

Draw a pyramid from following details and explain in brief.
Quantities of organisms are given-Hawks-50, plants-1000.rabbit and mouse-250 +250, pythons and lizard- 100 + 50 respectively.

Generally in summer the forest affeted by natural frre. Over a period of time it recovers itself by the process of successions. Find out the types of succession and explain.
Write about the significance of plant succession.

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