BOTANY

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BOTANY

CHAPTER 7 - ECOSYSTEM

MANOJ. G

HSST BOTANY, GHSS ANCHAL WEST, KOLLAM

YOUR NAME *

YOUR SCHOOL *

1. Find the odd one from the given ecosystems *

1 point

pond

lake

grass land

river

2. Vertical distribution of different species in an ecosystem at different levels is called *

1 point

species composition

standing crop

stratification

food web

3. GPP - R = NPP, where ' R ' represents *

1 point

Respiratoy loss

Respiratory gain

Rate of biomass production

Rate of photosynthesis

4. During decomposition, water soluble inorganic nutrients go down into the soil and get precipitated is called *

1 point

catabolism

fragmentaion

humification

leaching

5. The rate of decomposition is affected by - a. Oxygen, b. Chemical composition of detritus , c. soil moisture, d. temperature *

1 point

a and b are correct

c is correct

a,b,d is correct

a,b,c and d are correct

6. Grass -> Grass hopper -> Frog -> Snake. Find the primary carnivore in this food chain *

1 point

grass

grass hopper

frog

snake

7. According to 10 % law, *

1 point

10 % energy is lost during energy transfer

10 % energy is transferred from lower to higher trophic levels

10 % is trapped by photosynthesis

10 % energy is required by decomposers

8. The pioneer community in xerarch succession is *

1 point

lichen

phytoplanktons

forest

shrubs

9. Standing state means *

1 point

amount of nutrients present in the soil at a given time

amount of biomass present at each trophic level

number of food chains present in an ecosystem

number of nutrient cycles present in an ecosystem

10. Phosphorus cycle is a sedimentary cycle because the primary source of phosphorus is in *

1 point

atmosphere

body of consumers

producres

earth crust

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