IGCSE Biology Paper-3: Specimen Questions with Answers 357 - 358 of 358

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Question 357

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Short Answer▾

Explain why plants are the start of most food webs.

Explanation

Plants utilize 2 - 10 % of PAR in photosynthesis. The energy formed by the green plants (producers) then flows through different trophic levels of ecosystem i.e.. , primary, secondary, and tertiary consumers. Producers include green plants which can manufacture their own food. These can fix the energy obtained from the sun. Producers are autotrophic, generally chlorophyll bearing organisms.

Passage

Cholera is an example of a transmissible disease.

Question 358 (7 of 7 Based on Passage)

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Short Answer▾

Cholera causes diarrhea.

(ii) Outline the treatment for the symptoms of cholera.

Explanation

Signs and Symptoms Associated with Diarrhea May Include

  • Loose, watery stools
  • Abdominal cramps
  • Abdominal pain
  • Fever
  • Mucus in the stool
  • Bloating
  • Nausea
  • Urgent need to have a bowel movement

Treatment of Diarrhea

  • Loperamide (Imodium) slows the movement of food through your intestines, which lets your body absorb more liquid.
  • Bismuth subsalicylate (Kaopectate, Pepto-Bismol) balances out how fluid moves through your digestive tract.

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