Life exist in compost pits, permafrost polar regions. Our intestine host only 3-10 microbes. Major biomes of India include desert rainforest and tundra. The important physicochemical components alone chracterise different habitats.

How many of the above statements is/are wrong?

1. Three
2. Two
3. Only one
4. All four

The most ecologically relevant abiotic factor is

1. Water
2. Light
3. Temperature
4. Soil

Which of the following is best suited with the abiotic factor temperature, playing role in changes in physico-chemical environment of different habitats?

1. Average temperature of land is approximately 50 throughout year
2. The temperature of temperate countries is very much favourable for mango trees
3. Temperature affects kinetics of enzyme and hence basal metabolic activity of the body
4. Both A and B

Aquatic organisms face problems when water quality gets disturbed. Here water quality includes

1. Chemical composition, temperature, pH
2. Chemical composition and pH
3. Only pH
4. pH and temperature

The salt concentration of water bodies is measured in

1. Parts Per Thousands
2. Parts Per Million
3. Parts Per Billion
4. Parts per Hundreds

Light as an abiotic factor is important

1. For photosynthesis and flowering only
2. Foraging, reproductive and migratory activities of animals
3. A and B both
4. Only for autotrophs

Which statement among the following is wrong?

1. More than 500 m depth of ocean doesn't get sunlight
2. The spectral quality of solar light is important.
3. All the color components of visible spectrum are not available for marine plants.
4. The UV component of light is harmful to all the organisms

The percolation property of soil is controlled by which of the following parameters?

1. Composition and Aggregation
2. Composition and pH
3. Composition, Aggregation and grain size
4. Grain size, topography and pH

In aquatic habitats, the type of benthic animals is determined by

1. Grain size of soil at bottom
2. Sediment characteristics
3. Percolating property of soil
4. topography of soil

When we talk about constant internal environment of our body and of any other animal's body, we include

1. Optimal temperature
2. Osmotic concentration of body fluids
3. Environmental conditions affecting internal system of organisms
4. Both A and B