HARD
12th West Bengal Board
IMPORTANT
Earn 100

Match the following with correct combinations.

Column I  Column II
A. Mutualism 1. Tiger and Deer
B. Commensalism    2. Cuscuta and Cissus
C. Parasitism  3. Sucker fish and Shark
D. Predation 4. Crab and Sea anemone

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Important Questions on Ecology Environment & Population

EASY
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 13 - Ecology Environment & Population>EXERCISE>Q 9

The equation ∆Nn∆N1=β represents which of the following?

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12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 13 - Ecology Environment & Population>EXERCISE>Q 10
An association between two individuals where both are benefited and where neither can survive without the help of the other is 
EASY
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 13 - Ecology Environment & Population>EXERCISE>Q 11
The least porous soil among the following is
 
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12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 13 - Ecology Environment & Population>EXERCISE>Q 12
Niche is defined as the
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12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 13 - Ecology Environment & Population>EXERCISE>Q 13
Xerophytes are mostly
EASY
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 13 - Ecology Environment & Population>EXERCISE>Q 14
Select which one is correct in connection with parasitism
 
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 13 - Ecology Environment & Population>EXERCISE>Q 15
Cuscuta reflexa is an example of
EASY
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 13 - Ecology Environment & Population>EXERCISE>Q 16
Ammensalism is an association between two species here