Tag: living in harmony
Questions Related to living in harmony
The ultimate energy source of all ecosystems is?
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Producers
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Organic molecules
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Carbohydrate
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Solar radiation
The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs. The continual input of energy, mostly from sunlight, sustains the process of life. Sunlight allows plants, algae and cyanobacteria to use photosynthesis to convert carbon dioxide and water into organic compounds like carbohydrates. This process is the fundamental source of organic material in the biosphere. The overall productivity of an ecosystem is controlled by the total energy available.
Out of the total proposed cost of various ecosystem services, cost of climate regulations and habitat for wildlife are.
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$50\%$
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$10\%$
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$6\%$
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$25\%$
Robert Constanza and his colleagues have put the value of ecosystem services to $33$ trillion dollars a year. Out of which $50\%$ is proposed for formation of soil, prevention of flood and mitigating droughts. The value of $10\%$ each for nutrient cycle and recreation and $6\%$ for climate regulation and habitat preservation for wild flora and fauna has been proposed.
Edaphic factor refers to.
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Water
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Soil
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Relative humidity
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Altitude
Edaphic factors are classified under the abiotic factors affecting an ecosystem. Edaphic factors include factors of soil, e.g., soil texture, substratum, topography, mineral composition, pH, etc. These factors can influence the distribution and interrelationships of organisms, as well as rate of decomposition.
Terrestrial life would become impossible with
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Disappearance of moon
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Decrease in mean annual temperature by $10^o C$
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Change in orbit of earth
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Change in atmosphere permitting all solar radiations to reach lithosphere
The total amount of solar radiation reaching to the lithosphere do not enter the surface of the earth as it would heat up the earth making it unsuitable for any life. Therefore, 35% of the solar radiation are reflected back to the space.
II. Humidity
III. Vegetation
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I only
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II only
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III only
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I and II only
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I, II and III
An ecosystem is made up of abiotic components or abiotic factors which are non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems. Abiotic factors include water, light, radiation, temperature, humidity, atmosphere and soil.
All of these are examples of abiotic factors except
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Mushrooms
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Soil type
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Average yearly rainfall
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Sunlight
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Relative humidity
Which of the following is not a property of water?
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It becomes more dense when it freezes.
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It dissolves molecules in the air.
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It absorbs heat when the hydrogen bonds break.
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It forms hydrogen bonds with other water molecules to create surface tension.
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It form hydrogen bonds with other molecules by adhesion.
All of these are considered ecosystem services except
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Water purification
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Nutrient cycling
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Crop pollination
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Waste decomposition
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None of the above
Which of these is an example of an abiotic factor?
I. Crickets
II. Rainfall
Ill. Shark
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I only
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II only
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III only
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I and III only
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I, II and III
Which is not a natural ecosystem?
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Desert
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Aquarium
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Forest
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All of the above