Across
- 8. Energy flow in an ecosystem is ........
- 9. The transfer of food energy from plant sources through a series of organisms in an ecosystem is known as.......
- 10. The term ecosystem was introduced by ..... in 1935
Down
- 1. ......are mainly autotrophs
- 2. progressive increase in the concentration of toxic substances at different trophic levels.
- 3. The living organisms like autotrophs, heterotrophs form the ...... components.
- 4. The first ozone hole was discovered over ........
- 5. .....components are the non-living components
- 6. .........layer prevents the harmful UV rays of sun from entering to the earth’s surface.
- 7. ......is a network of food chains