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UNIT IX: Plant Ecology
- Online Test
UNIT IX: Plant Ecology
TEST : 2
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q1.
Niche overlap indicates
A.
Active co-operation between two species
B.
Two different parasites on the same host
C.
Sharing of one or more resources between the two species
D.
Mutualism between two species
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Answer :
Option C
Explaination / Solution:
No Explaination.
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q2.
Which one of the following pairs is mismatched?
A.
Savanna – Acacia trees
B.
Prairie – Epiphytes
C.
Tundra – Permafrost
D.
Coniferous forest – Evergreen trees
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Answer :
Option B
Explaination / Solution:
No Explaination.
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q3.
Which ecosystem has the maximum biomass?
A.
Grassland ecosystem
B.
Pond ecosystem
C.
Lake ecosystem
D.
Forest ecosystem
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Answer :
Option D
Explaination / Solution:
No Explaination.
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q4.
Which of the following would appear as the pioneer organisms on bare rocks?
A.
Mosses
B.
Green algae
C.
Lichens
D.
Liverworts
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Answer :
Option C
Explaination / Solution:
No Explaination.
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q5.
In which of the following both pairs have correct combination?
A.
Gaseous nutrient cycle Sulphur Sedimentary nutrient cycle : - Nitrogen and Carbon and Phosphorous
B.
Gaseous nutrient cycle Sedimentary nutrient cycle : - Sulphur and Phosphorous Carbon and Nitrogen
C.
Gaseous nutrient cycle Sedimentary nutrient cycle : - Carbon and Nitrogen Sulphur and Phosphorous
D.
Gaseous nutrient cycle Sedimentary nutrient cycle : - Carbon and Sulphur Nitrogen and Phosphorous
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Answer :
Option C
Explaination / Solution:
No Explaination.
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q6.
Secondary succession takes place on / in
A.
newly created pond
B.
newly cooled lava
C.
bare rock
D.
degraded forest
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Answer :
Option D
Explaination / Solution:
No Explaination.
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q7.
In an ecosystem the rate of production of organic matter during photosynthesis is termed as
A.
Secondary productivity
B.
net productivity
C.
Net primary productivity
D.
gross primary productivity
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Answer :
Option D
Explaination / Solution:
No Explaination.
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q8.
Natural reservoir of phosphorous is
A.
rock
B.
fossils
C.
sea water
D.
animal bones
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Answer :
Option A
Explaination / Solution:
No Explaination.
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q9.
Secondary productivity is rate of formation of new organic matter by
A.
consumers
B.
decomposers
C.
producers
D.
parasites
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Answer :
Option A
Explaination / Solution:
No Explaination.
# UNIT IX: Plant Ecology
# TN 12th Botany
Prepare / Learn
Q10.
Which one of the following processes during decomposition is correctly described?
A.
Catabolism – Last step in the decomposition under fully anaerobic condition
B.
Leaching – Water soluble inorganic nutrient rise to the top layers of soil
C.
Fragmentation – Carried out by organisms such as earthworms
D.
Humification – Leads to the accumulative of a dark coloured substance humus which undergoes microbial action in a very fast rate
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Answer :
Option C
Explaination / Solution:
No Explaination.
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