If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be
scavenger
tertiary producer
tertiary consumer
secondary consumer
Which of the following type of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100 mm
Grassland
Shrubby forest
Desert
Mangrove
The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called
pelagic zone
benthic zone
lentic zone
littoral zone
Edaphic factor refers to
water
soil
relative humidity
altitude
Which of the following is an ecosystem service provided by a natural ecosystem?
Cycling of nutrients
Prevention of soil erosion
Pollutant absorption and reduction of the threat of global warming
All of the above