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 the ocean doesn't get sunlight

2. The spectral quality of solar light is important.

3. All the color components of the visible spectrum are not available for marine plants.

4. The UV component of light is harmful to all the organisms

Salt concentration (salinity) of the sea measured in parts per thousand is
1. 10-15
2. 30-70
3. 0-5
4. 30-35

Which of the following forest plants control the light conditions aground?

1. Lianas and climbers

2. Shrubs

3. Tall trees

4. Herbs

What will happen to a well-growing herbaceous plant in the forest if it is transplanted outside the forest in a park?

More than 70% of the world's freshwater is contained in the:

1. Antarctica

2. Polar ice

3. Glaciers and Mountains

4. Greenland 

A terrestrial animal must be able to: 

1. Conserve water
2. Actively pump salts out, through the skin
3. Excrete large amounts of salts in urine
4. Excrete large amounts of water in urine

In which of the following pairs is the specific characteristic of a soil not correctly matched:

1. Terra rossa – Most suitable for roses

2. Chernozems – the richest soil in the world

3. Black soil – Rich in calcium carbonate

4. Laterite – Contains an aluminium compound