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May/June WAEC 2024 FREE BIOLOGY ANSWER ROOM [School Candidates]
WAEC Biology BIO Exam schedule
Thursday, 23rd May 2024
Biology 2 (Essay) – 09:30am – 11:10am
Biology 1 (Objective) – 11:10am – 12:00pm
2024 WAEC Biology Objectives (OBJ) Questions and Answers:
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2024 WAEC Biology ESSAY OR Theory Questions and Answers:
1)
2024 WAEC Biology Essay Answers
(1a)
(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.
(1b)
TABULATE
=ORGANISM=
(i) Flatworms
(ii) Earthworm
(iii) Cockroach
(iv) Human
(v) Plant
=STRUCTURE FOR EXCRETION=
(i) Flame cells
(ii) Nephridia
(iii) Malpighian tubules
(iv) Kidneys
(v) Stomatal pore
=FORM IN WHICH WASTE IS EXCRETED BY ORGANISM=
(i) Ammonia
(ii) Urea
(iii) Uric acid
(iv) Liquid (urine)
(v) Oxygen, carbon dioxide, and water vapor
(1c)
(i) Oxygen
(ii) Carbon dioxide
(iii) Water vapor
(iv) Resins
(v) Gums
(i) The meat may turn dark brown or grey as it starts to spoil.
(ii) A strong, unpleasant smell of decay will likely develop due to bacterial decomposition.
(iii) The meat may become slimy and sticky as bacterial and enzymatic activities break down the tissues.
(iv) Visible mold or fungal growth may appear on the surface of the meat.
(3aii)
Decomposition
(3aiii)
(i) Refrigeration – Low Temperature
(ii) Salting – Dehydration and Osmosis
(iii) Smoking – Dehydration
(iv) Canning – Sterilization
(3aiv)
(PICK ANY TWO)
(i) Temperature (warmth)
(ii) Humidity (high moisture)
(iii) Oxygen (Presence of air)
(iv) Microorganisms (bacteria, fungi, etc.)
(3b)
(i) Dired maize grains: Storage in airtight containers or silos
(ii) Fresh tomatoes: Refrigeration
(iii) Veetables: Freezing
(iv) Beans: Canning
(v) Milk: Pasteurization
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