Biology - Grade 12 - 2023 G.C
60 . Suppose your friend fails suddenly due to heart attack while he is playing football. The victim needs artificial breathing to keep him alive until medical support arrives. Which activity is strictly prohibited in this situation?

  1. Remove any obstacle from the mouth that might block the airway
  2. Open the airway by removing any obstacles from the mouth
  3. Make sure the airway is open and the head is tilted back
  4. Give mouth - to - mouth resuscitation if he is conscious


61 . A biologist collected two types of seeds (SA and SB) from the field and sowed them in moist soils enriched with nutrients. Then, he recorded his observations as follows:
SA
  • The seedling of this seed emerged from the soil curved while pushing up through the soil.
  • The hypocotyl straightened and carried the cotyledons and plumule above the soil surface.
SB
  • The plumule of the seedling pushed its way out of the soil, while the cotyledon remained underground.
  • Unlike what occurred during the germination of SA, the plumule of this seed did not form a hook.
Which one of the following is correct about the observations of the biologist?

  1. Both SA and SB are of monocots.
  2. SA is of a monocot, while SB is of a dicot.
  3. Both SA and SB are of dicots.
  4. SA is of a dicot, while SB is of a monocot.


62 . Which one of the following enzymes is correctly matched to the food stuffs it acts on?

  1. Pepsin - protein
  2. Maltase - lipids
  3. Amylase - fats
  4. Trypsin - starch


63 . Which one of the following structures of the heart is correctly matched with its function?

  1. Right atrium-contracts and forces deoxygenated blood into the lungs
  2. Left ventricle - contracts and forces oxygenated blood around the body
  3. Right ventricle - contracts and forces blood into the left ventricles
  4. Left atrium - contracts and forces blood into the right ventricles


64 . Which one of the following phyla is characterized by a flexible cartilaginous rod-like structure, that runs along the dorsal side of the body?

  1. Phylum Mollusca
  2. Phylum Chordata
  3. Phylum Annelida
  4. Phylum Arthropoda


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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