Related Questions

What environmental issue involves the excessive use of fertilizers and run-off chemimls into bodies of water. causing oxygen depletion and harm to aquatic ecosystems?
A Acid rani
B Eutrophication
C Desertification
D Deforestation
Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?
A By cyanobacteria
B By electrical discharges in the atmosphere
C By industrially synthesised fertilizer
D By denitrification
The type of crop which is able to fix nitrogen from air is known as
A Legume
B Rice
C Tuber
D Potato
The ability to fix atmospheric nitrogen is found in the
A Leaves of some crop plants
B Some marine red algae
C Some blue-green algae
D Cholera
Organisms that feed on the excreta of other organisms are called
A autotrophs
B heterotrophs
C coprophagous
D saprotrophs
Which of the following ecosystems covers the largest area of the earth's surface ?
A Desert Ecosystem
B Mountain Ecosystem
C Fresh water Ecosystem
D Marine Ecosystem
Which one of the following ecosystems covers the largest area of the earth's surface?
A Desert Ecosystem
B Grassland Ecosystem
C Mountain Ecosystem
D Marine Ecosystem
The energy in most ecosystems comes from
A Water
B Carbon dioxide
C Sun
D Soil
When the two ecosystems overlap each other, the area is called
A Habitat
B Niche
C Ecotone
D Ecotype
Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has
A High bond dissociation energy
B Smaller atomic radius
C Stable half filled 2p sub level
D High nuclear charge

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