Biology - Grade 12 -2023 G.C

Grade 12 students can now access their exam results by visiting the Educational Assessment and Examination Services (EAES) website.


90. Which one of the following temperature controlling mechanisms in homoiotherms is categorized into behavioral method?

  1. Sweating when the temperature increases
  2. Constriction of capillaries when the temperature falls
  3. Shivering as a result of drop in temperature
  4. Seeking shade when the temperature rises

91. Which one of the following sentences is correct about the activities of the heart?

  1. The noise of heartbeat one hears through a stethoscope is the sound of valves.
  2. As the heart beats blood travels through the arteries with a uniform pressure.
  3. Diastole is when the heart muscles contract and force the blood out.
  4. Systole is when the heart muscles relax and it fills with blood.

92. During culturing micro-organisms, all of the following activities are important, EXCEPT

  1. tilting the lid of the Petri dish during inoculation.
  2. adding distilled water to a sterilized agar.
  3. sterilizing the inoculating loops.
  4. transferring target micro-organisms into an agar medium.

93. Which one of the following diseases can be caused by more than one type of microorganisms?

  1. Cholera
  2. Gastroenteritis
  3. Typhoid
  4. Tuberculosis

94. Which one of the following diseases is correctly explained with its causes or symptoms?

  1. Syphilis is caused by Neisseria gonorrhoeae.
  2. Gonorrhoea has a burning sensation symptom while urinating.
  3. Gonorrhoea is caused by Treponema pallidum.
  4. Syphilis has sore ulceration on the genitals as a symptom.

We have provided these questions from previous years grade 12 Ethiopian Secondary School Leaving Certificate Examination (ESSLCE) exams with the sole purpose of assisting students in their studies and preparations for upcoming exams. Please be aware that these questions are not indicative of future exam content. Good luck with your studies!

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