Verified WAEC Biology Questions And Answers Legit Runz (Essay & Obj) May/June 2024

Biology solution for essay (theory, and objective questions is out. See the latest verified WAEC Biology Questions And Answers to help you get nice result in your WASSCE. As at of the time of release, all expo is verified and authentic The West African Examinations Council (WAEC) is a regional examination body that conducts standardized tests for English-speaking West African countries. It plays a crucial role in assessing the academic achievements of students at the secondary school level, facilitating their progress to higher education and beyond.

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Also Read: WAEC Physics Questions And Answers

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WAEC Biology Essay Answers

(i) Glomerulus:
The glomerulus filters blood to form a filtrate, which includes water, ions, and small molecules like glucose and amino acids, while retaining larger molecules such as proteins and cells.

(ii) Bowman’s Capsule:
The Bowman’s capsule collects the filtrate produced by the glomerulus and funnels it into the proximal convoluted tubule.

(iii) Proximal convoluted tubule:
The proximal convoluted tubule reabsorbs essential substances such as glucose, amino acids, and ions (e.g., sodium and chloride) from the filtrate back into the blood.

(iv) Distal convoluted tubule:
The distal convoluted tubule fine-tunes the reabsorption of ions and water, and it secretes additional waste products into the filtrate, helping to regulate electrolyte balance and pH.


(i) Flatworms
(ii) Earthworm
(iii) Cockroach
(iv) Human
(v) Plant

(i) Flame cells
(ii) Nephridia
(iii) Malpighian tubules
(iv) Kidneys
(v) Stomatal pore

(i) Ammonia
(ii) Urea
(iii) Uric acid
(iv) Liquid (urine)
(v) Oxygen, carbon dioxide, and water vapor

(i) Oxygen
(ii) Carbon dioxide
(iii) Water vapor
(iv) Resins
(v) Gums




(i) Mouth;
The mouth is responsible for the initial mechanical breakdown of food through chewing and the enzymatic breakdown of starches through the action of saliva.

(ii) Skin;
The skin regulates body temperature through the process of sweating, which also helps to excrete excess salts and maintain homeostasis.

(iii) Tongue;
The tongue assists in the manipulation of food for chewing and swallowing, and contains taste buds that help in the sensory evaluation of food.

(iv) Kidney;
The kidneys filter blood to remove waste products and excess substances, producing urine, which helps to maintain the body’s fluid and electrolyte balance.

(v) Stomach;
The stomach produces gastric juices, including hydrochloric acid and digestive enzymes, which help in the breakdown of food into a semi-liquid form called chyme.

(vi) Small Intestine;
The small intestine is the primary site for nutrient absorption; it continues the process of digestion with the help of enzymes and bile, and absorbs nutrients into the bloodstream.

(vii) Large Intestine;
The large intestine absorbs water and salts from the material that has not been digested as food, and compacts the remaining material into feces for excretion.

(viii) Liver;
The liver produces bile, which aids in the digestion and absorption of fats, and processes nutrients absorbed from the small intestine, detoxifying harmful substances and storing nutrients.

(i) Mouth (salivary glands produce amylase)
(ii) Stomach (produces pepsin)
(iii) Small intestine (produces various enzymes such as maltase, lactase, and sucrase; receives enzymes from the pancreas)

(i) Amylase (in saliva) – Breaks down starches into sugars.
(ii) Pepsin (in stomach) – Breaks down proteins into peptides.
(iii) Lipase (from pancreas) – Breaks down fats into fatty acids and glycerol.

(i) Glucose (from the breakdown of carbohydrates)
(ii) Amino acids (from the breakdown of proteins)

Excess salt can lead to increased blood pressure due to the retention of water, which increases the volume of blood.

(i) Energy – Carbohydrates in cassava provide a source of energy.
(ii) Protein – Groundnut soup contains proteins necessary for body repair and growth.
(iii) Nutrients – The meal provides essential vitamins and minerals required for overall health.



(i) Discoloration: The meat may turn brown or green.
(ii) Mold growth: Visible mold or fungal growth may appear on the surface.
(iii) Odor: A foul smell or strong odor may develop due to bacterial growth.
(iv) Texture: The meat may become slimy or sticky.

Decomposition (or putrefaction) caused by microbial activity.


(i) Refrigeration/Freezing
(ii) Salting
(iii) Smoking
(iv) Drying/dehydration

(i) Low temperature slows down microbial growth
(ii) Salt dehydrates microbes and inhibits their growth
(iii) Smoke contains compounds that kill or inhibit microbes
(iv) Removal of water inhibits microbial growth

(i) Temperature: High temperatures can accelerate the growth of bacteria and fungi, leading to faster decomposition of the meat.
(ii) Humidity: High humidity levels can create a conducive environment for microbial growth, increasing the rate of spoilage.

(i) Dried maize grains: Airtight storage (to prevent moisture absorption and pest infestation)
(ii) Fresh tomatoes: Canning (to prevent spoilage and extend shelf life)
(iii) Vegetables: Freezing (to retain nutrients and prevent spoilage)
(iv) Beans: Drying (to reduce moisture content and prevent microbial growth)
(v) Milk: Pasteurization (to kill harmful bacteria and extend shelf life)



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2023 WAEC Biology Answer

(i) The buccal cavity is the entry point for food and liquids into the digestive system.
(ii) The buccal cavity is responsible for chewing or masticating food.
(iii) The buccal cavity contains salivary glands that produce saliva.
(iv) The buccal cavity plays a vital role in speech production.

(i) The duodenum receives partially digested food from the stomach and continues the process of digestion.

How to Pass biology Examination

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