IGCSE Biology Paper-4: Specimen Questions with Answers 212 - 213 of 279

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Modern technology can be used to increase the yield of crops.

Question 212 (3 of 5 Based on Passage)

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Artificial selection and genetic engineering can also be used to increase crop yields. Explain the difference between these two techniques

Explanation

Artificial Selection and Genetic Engineering Can Also be Used to Increase Crop Yields
Artificial selectionGenetic engineering
Process of modifying thecharacteristics of living things in order to enhance one or more desirable traits by the selection in breeding, controlled by humans.Deliberate modification ofthe characteristics of an organism by manipulating its genetic material.
Does not introduce foreignDNA into the genome.Introduces foreign DNAinto the genome.
Done through the selection of mating partners artificially.Done through the introduction of recombinant plasmids to the host organism.
Does not require specificequipment and trained people.An efficient way ofproducing organisms with the desired trait.

Question 213 (4 of 5 Based on Passage)

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The use of chemicals, such as fertilizers, herbicides, and pesticides, is one of the developments used.

Suggest two dangers of using pesticides on farmland.

Explanation

  • Environmental threat
  • Numbers of crop pollinator decline
  • Food poisoning
  • Pesticide resistance
  • Bioaccumulation

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