Waste Materials in Plants

Plants lack well-defined organ systems but manage essential life processes like nutrition and excretion. Unlike animals, plants produce less toxic waste due to carbohydrate metabolism and efficiently reuse byproducts. They do not require specialized excretion systems. Common waste materials include gases and water, managed through diffusion and transpiration. Plants also produce diverse waste products like acids, gums, resins, and essential oils, which have various uses.

Why do plants not require complex excretory systems like animals?

• They produce more waste than animals.

• Their waste is more toxic than animal waste.

• They have efficient ways to reuse byproducts.

• They do not produce any waste.

What is the main site for gas exchange in plants?

• Roots

• Stomata

• Leaves

• Flowers

How much of the absorbed water is typically used by plants?

• 10%

• 1%

• 100%

• 50%

What is the primary reason for the sour taste of lemon?

• Presence of essential oils

• Presence of tartaric acid

• Presence of alkaloids

• Presence of citric acid

Which tree is known for producing rubber?

• Coniferous tree

• Acacia tree

• Rubber tree

• Chicle tree

What is the use of tannins in the industry?

• Making rubber

• Producing essential oils

• Chewing gum base

• Leather production

Which plant is known for producing caffeine?

• Coffee plant

• Poppy plant

• Tobacco plant

• Cinchona tree