South Africa Matric · Life Sciences

Genetics, Homeostasis and Endocrine System

12 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 12 questions

  1. Which hormone is secreted by the beta cells of the Islets of Langerhans in response to elevated blood glucose levels?
  2. In humans, haemophilia is a sex-linked recessive disorder carried on the X chromosome. A carrier female () and an unaffected male () have children. What is the probability that their s…
  3. Which part of the human brain controls vital autonomic functions such as breathing rate, heart rate, and blood pressure?
  4. During hot environmental conditions, negative feedback mechanisms trigger vasodilation in the skin. Vasodilation helps restore normal body temperature by:
  5. What is the structural functional unit of the human kidney responsible for filtration and reabsorption?
  6. Which phase of meiosis is characterized by the separation of homologous chromosome pairs toward opposite poles of the spindle?
  7. The reproductive adaptation known as serotiny involves:
  8. What specific chemical role do smoke compounds such as karrikins play in fynbos ecology?
  9. The word senescent in the passage is closest in meaning to:
  10. According to the passage, why are wildfires beneficial to the fynbos ecosystem?
  11. The word endemism in the text means that the plant species:
  12. It can be inferred from the passage that suppressing all wildfires in the fynbos biome would:

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