Carbohydrates are commonly found as starch in plant storage organs. It is a chemically non-reactive and osmotically inactive polysaccharide with a molecular weight. Carbohydrates perform a vital role in living organisms. Starch and other polysaccharides serve as energy storage in plants, particularly in seeds, tubers, etc. which provide a major energy source for animals, including humans.

Correct Option: B

Carbohydrates are commonly found as starch in plant storage organs. It is a chemically non-reactive and osmotically inactive polysaccharide with a molecular weight. Carbohydrates perform a vital role in living organisms. Starch and other polysaccharides serve as energy storage in plants, particularly in seeds, tubers, etc. which provide a major energy source for animals, including humans.

Phenyl Mercuric Acetate (PMA) is an antitranspirant. Antitranspirants are compounds applied to the leaves of plants to reduce transpiration without affecting gaseous exchange. They are used on christmas trees, cut flowers, newly transplanted shrubs, and in other applications to preserve and protect plants from drying out too quickly. They have ‘also been reportedly used to protect leaves from salt burn and fungal diseases.
Anti Transpirants are of two types :
1. Metabolic inhibitors
2. Film forming antitranspirants

Correct Option: B

Phenyl Mercuric Acetate (PMA) is an antitranspirant. Antitranspirants are compounds applied to the leaves of plants to reduce transpiration without affecting gaseous exchange. They are used on christmas trees, cut flowers, newly transplanted shrubs, and in other applications to preserve and protect plants from drying out too quickly. They have ‘also been reportedly used to protect leaves from salt burn and fungal diseases.
Anti Transpirants are of two types :
1. Metabolic inhibitors
2. Film forming antitranspirants

Transpiration is a process of loss of water in the form of vapours from the aerial parts of the plants. Transpiration is inversely proportional to the atmospheric humidity. The rate of transpiration would be higher when humidity is low.

Correct Option: D

Transpiration is a process of loss of water in the form of vapours from the aerial parts of the plants. Transpiration is inversely proportional to the atmospheric humidity. The rate of transpiration would be higher when humidity is low.

When sugar is converted into starch, the osmotic concentration of guard cells fall and they lose water to adjacent cells and stomata closes.

Correct Option: A

When sugar is converted into starch, the osmotic concentration of guard cells fall and they lose water to adjacent cells and stomata closes.

The rate of transpiration is inversely proportional to the atmospheric pressure. Increased height above the sea level lowers the atmospheric pressure and increases the rate of evaporation.

Correct Option: D

The rate of transpiration is inversely proportional to the atmospheric pressure. Increased height above the sea level lowers the atmospheric pressure and increases the rate of evaporation.