Ecosystem(Biotic and Abiotic)

This MCQ is based on an Ecosystem(An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. Abiotic factors include rocks, temperature, and humidity).

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Soil developed from sedimented rock:

Force Science Edaphology Pedogenesis All of these

Best soil for plant growth is:

Grit Sandy Soily Clay

Soil particle determine the character of:

Organisation Biomass Area capacity Soil plants

Plant roots soil water is:

Cellular water Surface water Humidity water Gravitational water

Who introduced term Ecosystem?

Leaneous Reiter Odum Aristle

Decomposers like fungi and bacteria are: (i) autotrophs (ii) heterotrophs (iii) saprotrophs (iv) chemo-autotrophs Choose the correct answer:

i and iii i and iv ii and iii i and ii.

The process of mineralisation by micro organisms helps in the release of:

inorganic nutrients from humus both organic and inorganic nutrients from detritus organic nutrients from humus inorganic nutrients from detritus and formation of humus.

Productivity is the rate of production of biomass expressed in terms of: (i) (kcal m-1) yr-1 (ii) g-2yr-1 (iii) g-1 yr-1 (iv) (kcal m-2 yr-1

ii iii ii and iv i and iii.

An inverted pyramid of biomass can be found in which ecosystem?

Forest Marine Grassland Tundra.

Which of the following is not a producer?

Spirogyra Agaricus Volvox Nostoc.

Pyramid of numbers is

Ether upright or inverted

Always inverted

Always upright

Neither upright nor inverted.

Energy flow in ecosystem is