TN State Board Samacheer Kalvi Online Test for 12th Std - Biology - English - Ecosystem

Question 1 Of 10

Lowest productivity is seen in

Ocean Grass land forest savannah

Question 2 Of 10

Examine the ecological pyramid given below and select the type of it represent

Upright pyramid of biomass Upright pyramid of number Inverted pyramid of biomass Inverted pyramid of number

Question 3 Of 10

The position of organisms in food chain is refers to

Ecosystem Trophic level Food chain Ten percent law

Question 4 Of 10

Which of the following light is efficient for

Blue and red Blue and green Blue and white Blue and violet

Question 5 Of 10

Assertion and Reason

R does not explains A R explaining A A is correct R is wrong Both A and R are wrong

Question 6 Of 10

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

Question 7 Of 10

Which one is in descending order of a food chain

Producers → Secondary consumers → Primary consumers→ Tertiary consumers Tertiary consumers → Primary consumers → Secondary consumers → Producers Tertiary consumers → Secondary consumers → Primary consumers→ Producers Tertiary consumers → Producers → Primary consumers → Secondary consumers

Question 8 Of 10

Solar energy used by green plants for photosynthesis is only

2-8% 2-10% 3-10% 2-9%

Question 9 Of 10

Which of the following determine the productivity of different ecosystem.

Fixation of radiant energy Population Size of ecosystem Number of plants

Question 10 Of 10

The following diagram represents

pyramid of number in a grassland ecosystem pyramid of number in a pond ecosystem pyramid of number in a forest ecosystem pyramid of biomass in a pond ecosystem

Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 12th Standard Biology - English Medium - Ecosystem

Samacheer Kalvi 12th Biology - Ecosystem - Book Back Questions in English Medium