Competition for food, light and space is most severe in
closely related species growing in the same niche
closely related species growing in different habitats
distantly related species growing in same habitat
distantly related species growing in different habitats
- The ultimate source of energy for fish is
- Hie earliest settlers on barren lands are generally
- Primary treatment of sewage means
- Biologists celebrate 5th June as
- Humus is an example of
- Hie sequence blue green algae > crustose lichens » foliose lichens > mosses » shrubs » dicotyledonous…
- The least porous soil among the following is
- First link in any food chain is green plant because
- Hydrilla is a
- Desert plants are generally
- One of these is a renewable source of energy:
- Soil particles arranged in order of increasing size are
- Mark which is true
- Biosphere is:
- The nitrifying bacteria which oxidise nitrite to nitrates include
- A habitat of long severe winters and growing season limited to a few months of summer constitutes
- Commensalism is
- What is the major constituent of biomass of an organism
- Competition for food, light and space is most severe in
- What will happen if our water resources are continued to be polluted by industrial wastes
- Deforestation may reduce the chances of
- Autumn colouration of leaves appears only in
- An American plant which had become a troublesome weed in India is
- Silent valley is situated in
- In grassland ecosystem the pyramid of energy is
- Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
- . Biome is
- The best indicator of SO^2 pollution is
- Which of the following functions performed by forests help most in controlling drought
- Water plants usually have