Ecosystem Test - 2

Cryptophytes are the buds that occur very deep in the soil e.g. bulbs, rhizomes, corm, tubers etc.

homeostasis is the state of steady internal physical and chemical conditions maintained by living systems.It can also be defined as the maintenance of a constant internal environment in response to environmental changes.

In phosphorous cycle, gaseous exchange between organism and atmosphere is negligible. There is no respiratory release of phosphorous in the atmosphere.

In pond ecosystem, biomass of consumers is greater than biomass of producers. Such a pyramid is inverted.

Ecotone is the transitional zone between two adjacent communities. It is where two biomes meet and integrate.

Abyssal zone lies 2000 m deep below the ocean and complete darkness persists here.

Oligotrophic lakes are poor in nutrients and phosphates and are generally deep, e.g., Sambhar Lake. This is an example of a salty lake.

Monomictic lakes are tropical lakes and are characterised by overturning of water once in a year.

A shallow water region of the marginal slope with light penetration is called the littoral zone.

A psammosere is a seral community, an ecological succession that began life on newly exposed coastal sand.