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.

HAMLIE, 2015 E.C JULY 2023 G.C

1. Which one of the following monohybrid crosses can be a test cross?

  1. Rr X Rr
  2. RR X Rr
  3. RR X rr
  4. RR X RR

2. Which of the following is different from the rest with regard to conservation of vegetation?

  1. Using local practices for conservation
  2. Replanting of land with endemic species
  3. Replanting indigenous tree species
  4. Large scale introduction of exotic plants

3. In the nervous co-ordination system, which of the following statements explains the synapse? It is a

  1. chemical that transmits nerve impulses across the nervous system.
  2. part of the skull that encloses brain for the purpose of protection.
  3. junction between two neurons or a neuron and a muscle.
  4. short term change in the electrical potential on the surface of cells.

4. Two students want to demonstrate a simple spinal reflex action using the knee jerk reflex. One of them sits down with one leg loosely crossed over the other. The other hits the crossed leg just below the knee cap gently but firmly using the edge of his hand. Which one of the following situations will happen during this demonstration? The

  1. impulse travels to the brain.
  2. hit ligament stretches the muscle.
  3. lower leg to jerk downwards and inwards.
  4. impulse travels to quadriceps muscle from the brain.

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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