Ecosystem
Important components of ecosystems, biomes, biodiversity, greenhouse effects, and ecological processes
Questions
Which of the following regions of marine ecosystem is completely dark?
- Abyssal zone
- Photic zone
- Continental shelf
- Continental slope
- Aphotic zone
Sambhar lake of Rajasthan is an example of
- eutrophic lake
- oligotrophic lake
- mesotrophic lake
- ox bow lake
- manmade lake
Which of the following types of lakes is characterised by annual water overturning?
- Monomictic
- Dimictic
- Metalimnion
- Hypolimnion
- Epilimnion
Which of the following zones of fresh water habitat is a shallow water region?
- Limnetic zone
- Profundal zone
- Littoral zone
- Abyssal zone
- Pelagic zone
Which of the following greeenhouse gases is primarily produced by paddy fields?
- Carbon monoxide
- Sulphur dioxide
- Methane
- Carbon dioxide
- Nitrogen
Cycling of elements in an ecosystem is referred to as
- geological cycle
- biogeochemical cycles
- geochemical cycles
- chemical cycles
- all of the above
Root nodules appear red due to the presence of
- anthocyanin
- phytochrome
- leg haemoglobin
- cytochromes
- chlorophyll
Deciduous forests occur in
- rain shadow
- tropic
- temperate zone
- taiga
- savanna
A submerged aquatic plant always found just below the surface of water is
- potamogeton
- lemna
- hydrilla
- vallisneria
- azolla
Succession on sand dunes is referred to as
- mesosere
- hydrosere
- psammosere
- xerosere
- lithosere
Drip tip foliage is found in
- coniferous forests
- tropical evergreen forests
- grasslands
- tropical savanna
- deciduous forests
Top layer of marine ecosystem possess
- planktons
- nektons
- both of the above
- neustons
- benthos
In a fresh water ecosystem, the zone of ecosystem that receives effective light for producers is
- littoral zone
- limnetic zone
- benthic zone
- profundal zone
- abyssal zone
Term 'lotic' is used for
- all kinds of water
- pond water
- stagnant fresh water
- fresh flowing water
- none of the above
Radiant energy is not required in the process of
- seed germination
- plant growth
- plant movement
- flowering
- fertilization