Automated PLE Science Exam Paper Generator

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Any two of: Prostate cancer, Prostate enlargement, Testicular cancer, Hydrocele, or Infertility. (b) Allows the mother to regain her physical health/strength before the next pregnancy (or allows her time to nurse the newborn child properly). (c) Any one of: The vagina has a larger mucosal surface area exposed to seminal fluid. Seminal fluid remains inside the vagina for a longer duration of time. The delicate vaginal lining is prone to micro-tears during intercourse.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Raised dish drying rack (or Plate stand). (b) (i) Keeps plates away from crawling insects, dogs, and chickens (ii) Prevents mud and dust splashes from dirtying clean plates. (c) The ultraviolet (UV) rays of sunlight kill harmful bacteria on the plates.

💡 Examiner Deduction Warning: Award 4 marks for complete sanitation rationale.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Accept any two of: - Accessibility of the site - Nearness to a water source for watering young seedlings - Type and drainage of soil - Availability of adequate land - Security against stray livestock and fire outbreaks (b) Accept any two of: - Provides timber and building poles for sale - Provides firewood and wood fuel - Provides shade and purifies the air - Can be used for apiculture (bee farming) - Creates employment opportunities

💡 Examiner Deduction Warning: Cognitive Level: Application (A).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Vena cava (Superior and Inferior vena cava) (b) Oxygenated blood (c) Accept any two of: - Have thick muscular walls to withstand high blood pressure from the heart - Have narrow lumen to maintain high pressure - Have elastic walls to expand and recoil as blood pulses - Have no valves (except at the base of the aorta and pulmonary artery)

💡 Examiner Deduction Warning: Cognitive Level: Comprehension & Knowledge (C & K).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Kwashiorkor. (b) Marasmus. (c) Proteins. (d) Milk / Eggs / Fish / Mukene / Beans / Groundnuts.

💡 Examiner Deduction Warning: Clear 4-mark clinical comparison.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Accept any two of: - Overgrown bushy compound and tall grass - Presence of stagnant water pools - Scattered empty tins, plastic bottles, and broken containers holding water - Poor disposal of human faeces and unhygienic latrines - Open, rotting rubbish heaps near classrooms (b) Accept any two of: - Malaria - Bilharzia (Schistosomiasis) - Cholera - Typhoid fever - Dysentery

💡 Examiner Deduction Warning: Cognitive Level: Application (A).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) (i) Black jack: Animal dispersal (epizoochory) (ii) Sycamore: Wind dispersal (b) Accept any two of: - Have wing-like structures (e.g. sycamore) - Have parachute of fine hairs / pappus (e.g. dandelion, tridax) - Are very small and light in weight - Are dust-like (e.g. orchids)

💡 Examiner Deduction Warning: Cognitive Level: Comprehension (C).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Steam (or hot water droplets). (b) A scald. (c) Immediately dip/place the injured arm in clean cold water. (d) Any one of: Use insulators/holder cloths to remove covers, avoid playing near cooking stoves, or cook from a raised place.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Saanen (or Toggenburg). (b) Merino sheep. (c) (i) They have high resistance to local tick-borne diseases and parasites (ii) They can survive on poor quality browse and pasture.

💡 Examiner Deduction Warning: Reward accurate breed identification.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Any two: Tendons, Ligaments, Cartilage. [1 mark] (b) A tendon attaches muscle to bone, whereas a ligament joins bone to bone at a joint. [1 mark] (c) (i) Synovial fluid lubricates the articulating bone surfaces. (ii) Smooth articular cartilage cushions bone ends and prevents direct bone-to-bone contact. [2 marks]

💡 Examiner Deduction Warning: Use the mnemonic BLB (Bone-Ligament-Bone) and MTB (Muscle-Tendon-Bone) to prevent reversing definitions in part (b).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Accept any two of: - Cold-blooded (poikilothermic) - Live both on land and in water - Lay eggs in water covered in jelly - Undergo external fertilization - Breathe through moist skin and lungs (gills at larval/tadpole stage) (b) Accept any two of: - Fish breathe using gills throughout their lives, while adult amphibians breathe using lungs and moist skin - Fish have fins for swimming, while amphibians have limbs (legs) with webbed toes - Fish have scales covering their bodies, while amphibians have smooth moist skin without scales - Fish have a lateral line to detect vibrations, while amphibians detect sound using eardrums

💡 Examiner Deduction Warning: Cognitive Level: Comprehension (C).

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Foot rot. (b) Wet, muddy, and dung-filled dirty floors. (c) (i) Regularly trim overgrown hooves (ii) Walk goats through a copper sulphate footbath (iii) Keep pens clean and dry (use slatted floors).

💡 Examiner Deduction Warning: Practical veterinary question.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) To suck out foul odours from the pit and expel them high into the air. (b) To trap flies so they cannot escape and spread disease germs. (c) (i) Wind blowing across the top of the vent pipe draws out smelly gases continuously (ii) The latrine interior is kept dark, forcing air currents up the pipe.

💡 Examiner Deduction Warning: Classic 4-mark UNEB sanitation question.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) A short circuit is an accidental direct connection between live and neutral wires with near-zero resistance, resulting in dangerously high current flow. (b) 1. Frayed, worn-out, or damaged insulation on cables. 2. Overloading multi-plug sockets with heavy appliances. (c) Ordinary water contains dissolved minerals and is a good electrical conductor, which will shock and electrocute anyone attempting to put out the fire.

💡 Examiner Deduction Warning: Never use water on electrical fires—use dry powder or carbon dioxide fire extinguishers.

✅ Official UNEB Section B Scoring Guide (Total: 4 Marks):

(a) Step 1: Measure one litre of clean boiled water and pour it into a clean container. Step 2: Add eight level teaspoons of sugar into the water. Step 3: Add one level teaspoon of salt and stir thoroughly until completely dissolved. (b) To replace lost water and essential mineral salts (prevents severe dehydration)

💡 Examiner Deduction Warning: Cognitive Level: Application (A). Strict recipe proportions: 1 litre water + 8 level teaspoons sugar + 1 level teaspoon salt.