Ecosystem Set 2 - ilmijazeera

Results

#1. From the top carnivores energy is:

Passed to the herbivores b. c. d.

Recycled and passed on to the producers

Passed to the consumers

Lost to the space in the form of heat

#2. Of the total sunlight that strikes the green plants, the amount absorbed by the chlorophyll is about

one half

one third

two third

one fourth

#3. The amount of absorbed energy that is used in photosynthesis and stored as chemical energy of food is almost:

20%

25%

35%

50%

#4. At each step in the transfer of energy from one organism to another, a large part of the energy is:

Fixed

Utilized

Stored

Lost

#5. Net primary productivity is determined by the relative rates of:

photosynthesis

respiration

both a & b

none of these

#6. Primary productivity is the production of new organic matter at the

Consumers level

Producers level

Decomposers level

Herbivores level

#7. Energy and nutrients enter a community by way of the

producers

consumers

scavengers

decomposers

#8. A group of interconnected food chains is called a

pyramid of energy

complex food chain

food web

food cycle

#9. The rate of which light energy is converted to the chemical energy of organic molecules is the ecosystem’s

net primary productivity

gross primary productivity

net secondary productivity

gross secondary productivity

#10. About how much of the chemical energy within producer tissues becomes chemical energy within herbivore tissues?

10%

60%

90%

Finish