When young plants are grazed too heavily they get killed because
the roots are starved
of the mechanical injury to roots
most of the aerial parts are eaten away
of the mechanical injury to branches
- The nitrifying bacteria which oxidise nitrite to nitrates include
- The best indicator of SO^2 pollution is
- Which of the following is normally not at atmospheric pollutant
- Soil particles arranged in order of increasing size are
- The first stage of plant succession on earth is called
- The source of energy in the ecosystem is:
- Which one of the following is associated with the conservation of forest ?
- Mark which is true
- Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
- One of these is a renewable source of energy:
- In cities like Mumbai and Delhi, the major air pollutants are
- Commensalism is
- Carbon cycle includes
- The ultimate source of energy for fish is
- Competition for food, light and space is most severe in
- Silent valley is situated in
- Tropical evergreen forests are seen in
- Deforestation may reduce the chances of
- Hie sequence blue green algae > crustose lichens » foliose lichens > mosses » shrubs » dicotyledonous…
- Primary treatment of sewage means
- Water plants usually have
- What will happen if our water resources are continued to be polluted by industrial wastes
- Which is the correct food chain
- Smog is a common pollutant in places having
- An American plant which had become a troublesome weed in India is
- Radiation is a health hazard as it causes
- Desert plants are generally
- Autumn colouration of leaves appears only in
- A pollutant is any substance, chemical or other factor that changes
- Pedology is the study of