Bt crops are genetically modified to contain a bacterial gene from Bacillus thuringiensis. What advantage does this gene give to the plant?Provides mineralsProtection from bacteriaProtection from insectsIncreases rate of growth2Which of the following is an advantage of Bt crops?Does not kill pests that drink cell sap rather than consume the plant tissueResistance to the toxin may developKnock-on effect on the food chainMinimises the need for chemical pesticides3What is the best definition for ‘biological control’?Genetically modifying plants to produce toxins against pestsUsing chemical pesticides to control pestsUsing the pests’ own natural predators to control themUsing fertilisers to provide essential minerals to the soil4What is a disadvantage of using inorganic fertilisers?They add essential minerals to the soilThey can be washed away into water systemsThey can kill pestsThey improve plant growth
Question
Bt crops are genetically modified to contain a bacterial gene from Bacillus thuringiensis. What advantage does this gene give to the plant?Provides mineralsProtection from bacteriaProtection from insectsIncreases rate of growth2Which of the following is an advantage of Bt crops?Does not kill pests that drink cell sap rather than consume the plant tissueResistance to the toxin may developKnock-on effect on the food chainMinimises the need for chemical pesticides3What is the best definition for ‘biological control’?Genetically modifying plants to produce toxins against pestsUsing chemical pesticides to control pestsUsing the pests’ own natural predators to control themUsing fertilisers to provide essential minerals to the soil4What is a disadvantage of using inorganic fertilisers?They add essential minerals to the soilThey can be washed away into water systemsThey can kill pestsThey improve plant growth
Solution
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The bacterial gene from Bacillus thuringiensis gives the plant protection from insects. This is because the gene produces a toxin that is harmful to certain insects, thus providing the plant with a built-in defense mechanism.
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An advantage of Bt crops is that they minimize the need for chemical pesticides. Since the plants have their own built-in insect defense, farmers don't need to spray as much chemical pesticides, which can be harmful to the environment and to non-target species.
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Biological control is best defined as using the pests’ own natural predators to control them. This is a method of pest control that relies on predation, parasitism, herbivory, or other natural mechanisms.
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A disadvantage of using inorganic fertilisers is that they can be washed away into water systems. This can lead to a problem called eutrophication, where the excess nutrients cause an overgrowth of algae and other plants in water bodies, which can deplete oxygen levels and harm aquatic life.
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Bacillus thuringiensis is used to control
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How does BT corn and BT eggplants reduce insecticide use, improve farmer health, and increase crop yield? Group of answer choicesIt produces a plant that is bigger and contains more nutrientsIt produces a plant that can withstand severe climate conditionsIt produces a plant that kills insects but is harmless to humansIt produces a plant that does a better job at fixing nitrogen in the soi
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