HERBICIDE AND ENVIRONMENT

Loss of herbicide can occur because of herbicide is weakly bound to soil particles or cell wall constituents of plant debris

• Conjugation

• Adsorption

• Degradation

• Oxidation

Some plants can also degrade herbicides into harmless compounds

• anaerobic degradation

• photodecomposition

• phytoremediation

• percolation

Air pollution from herbicide can be caused by volatilization of herbicide which can increase due to

• Low humidity, high temperature

• High humidity, high temperature

• Low humidity, low temperature

• High humidity, low temperature

Decomposition of dead fish from herbicidal water pollution can causes two of the followings

• Increase in aquatic animals

• Drift of herbicide residue

• High biological oxygen demands

• Suffocations of bigger fish

Two effects of soil pollution to crops are

• Poor root development

• Water pollution

• Shoot yellowing

• Increase in ingestion of herbicides

The increase in concentration of herbicide that occurs as it moves up the food chain is called as bioamplification

• TRUE

• FALSE

Bioaccumulation is the __________ of chemicals in an organism that takes place if the rate of intake exceeds the rate of excretion

• concentration

• transferring

• increase

• accumulation

To use microorganisms as bioremediation their basic needs must be fulfilled such as

• Temperature

• pH

• Oxygen

• All of the answers

Choose the correct examples of phytoremediation plants

• Zea mays

• Brassica juncea

• Lemna sp.

• Imperata cylindrica

One of the advantages of phytoremediation is the method is ex situ method that aims for a lower costs

• TRUE

• FALSE