2025 WAEC BIOLOGY: 2025 WAEC BIOLOGY PRACTICAL ANSWERS (3842)
2025 JAMB, WAEC, NECO GCE 2nd SERIES RUNS
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Monday, 31st August 2023
Biology 3 (Practical) (Alternative A) – 09:30 a.m. – 11:30a.m. (1st Set)
Biology 3 (Practical) (Alternative A) – 12:00 p.m – 2:00 p.m. (2nd Set)
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Welcome to official 2025 Biology WAEC answer page. We provide 2025 Biology WAEC Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct WAEC Bio Expo. WAEC Biology Questions and Answers 2025. WAEC Bio Expo for Theory & Objective (OBJ) PDF: verified & correct expo Solved Solutions, 2025 WAEC BIOLOGY PRACTICAL ANSWERS. 2025 WAEC EXAM Biology Questions and Answers
(1ai)
TABULATE
- TEST: Specimen B + 2drops of iodine solution
- OBSERVATION: No precipitate is found (No reaction is occurring)
INFERENCE: It indicates specimen B contains no starch content
(1aii)
TABULATE
- TEST: Specimen B + 2ml of NaOH(aq) + 3 drops of CuSO4 + shake
- OBSERVATION: The mixture will turn to purple or violet colour
- INFERENCE: Protein is present
(1b)
(i) Test for starch
(ii) Test for protein (Biurets test)
(1c)
- Additional income is obtained through quality mushrooms
- They contain vitamins and proteins and Laos acts as antioxidants supporting the immune system
(1di)
Fungi
(1dii)
- Eukaryotic organism
- Absence of chlorophyll
- Cell walls made of chitin instead of cellulose
(1diii)
- Moulds
- Mildews
- Smuts
- Rusts
- Yeast
(1ei)
Mollusca
(1eii)
- Presence of tentacles
- Possession of soft and unsegmented bodies
- The body is covered by a mantle and she'll
- They are bilaterally symmetrical
- They are triploblastic with three layers
(1fi)
- Specimen C (mushrooms) are decomposers breaking down surface waste releasing nitrogen back into the soil in form of ammonium nitrate, a nutrient essential for plant survival
(1fii)
Saprophytic mode of nutrition
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(2a)
E: Succulent Fruit
F: Berry/Flesh Fruit
H: Legume/Pod
(2b)
E: Parietal Placentation
F: Axile Plancentation
(2c)
E: Human
F: Animal
H: Explosive Mechanism
(2di)
Specimen E attracts birds, squirrels, and other small mammals. Consumption of the fruit will lead to dispersal of the seeds in faeces (by a human)
(2dii)
Vitamin C, Magnesium, Iron, Copper, and Manganese.
(2ei)
Green
(2eii)
It signifies that the pod is young and immature
(2fi)
Marginal placentation
(2fii)
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(4a)
TABULATE
- Specimen P-
- Test: 2 drops of specimen P in water
- Observation time(seconds): 3-4 seconds before it dissolves
- Medium of spread: Water
- Sense organ: Eye
-Specimen Q-
- Test: Teaspoon of specimen Q + water
- Observation time(seconds): Dissolves within 65 seconds
- The medium of spread: Water
- Sense organ: Eye
-Specimen R-
- Test: Cut section of specimen R
- Observation time(seconds): 2 seconds or almost immediately
- The medium of spread: Air
- Sense organ: Nose
(4b)
Osmosis
(4c)
(i)
- Increase in temperature
- Difference in concentration
(ii)
- Molecular size
- Increase in temperature
(iii)
- Increase in temperature
- Difference in concentration
(4di)
(4dii)
It is Whorl
(4diii)
- Loop
- Whorl
- Arch/Compound
(4div)
- Crime detections
- Identification of individuals
- Genetic variation in man
(4dv)
Discontinuous variation
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