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*2025 OYO STATE MOCK BIOLOGY PRACTICAL ANSWER*

Question 1 (Seed Structure)

(a) Name the structures labeled A to E

*A – Plumule*

*B – Cotyledon*

*C – Radicle*

*D – Micropyle*

*E – Testa*


(b) To what group of flowering plants does the diagram belong?

*The diagram represents a dicotyledonous seed (likely a bean or groundnut seed).*


(c) In which of the labeled parts is food stored?

*Food is stored in the cotyledon (B).*


(d) Outline the process of germination of the structure represented in the diagram.

*1. Imbibition – The seed absorbs water through the micropyle.*


*2. Activation of enzymes – Water activates enzymes that break down stored food.*


*3. Radicle emergence – The radicle (C) emerges first and grows downward to form the root.*


*4. Plumule emergence – The plumule (A) grows upward to form the shoot.*


*5. Development – The seedling develops leaves and begins photosynthesis.*


Question 2 (Vertebral Column)

(a) Identify the bones labeled I, II, and III and state one distinguishing characteristic.

*I – Cervical Vertebra (Atlas) → Lacks a body and allows head nodding.*

*II – Cervical Vertebra (Axis) → Has the odontoid process (dens) for rotation.*

*III – Lumbar Vertebra → Has a large body for weight-bearing.*


(b) Identify the structures labeled A to G and state their functions.

*A – Neural Spine → Provides attachment for muscles and ligaments.*

*B – Transverse Process → Provides attachment for ribs and muscles.*

*C – Centrum (Body) → Supports weight and bears stress.*

*D – Vertebral Foramen → Houses the spinal cord.*

*E – Odontoid Process (on Axis) → Allows rotation of the head.*

*F – Transverse Foramen (on cervical vertebrae) n* *Passage for blood vessels.*

*G – Articular Facet → Connects adjacent vertebrae.*


(c) Three differences between I and II

*1. Atlas (I) lacks a body, but Axis (II) has one.*


*2. Atlas (I) allows nodding, while Axis (II) allows rotation of the head.*


*3. Axis (II) has the odontoid process (dens), which Atlas (I) lacks.*


Question 3 (Ecology and Nutrition)

(a) Three possible modes of nutrition carried out by organisms in the diagram

*1. Autotrophic (Photosynthesis) – By green plants (Plant II, Legume V).*


*2. Saprophytic (Decomposition) – By fungi (Mushroom VI) and bacteria.*


*3. Heterotrophic (Feeding on other organisms) – By animals (Rat VII, Snail IV).*



(ii) Reasons for the above

*1. Green plants manufacture their own food via photosynthesis.*


*2. Fungi decompose organic matter for nutrients.*


*3. Animals consume plants or other organisms for food.*


(b) Nitrogen cycle explanation involving labeled points

*1. Lightning (II) fixes atmospheric nitrogen into nitrates.*


*2. Legumes (V) have nitrogen-fixing bacteria that convert atmospheric nitrogen into usable forms.*


*3. Earthworms and decomposers (VI, Decaying matter VIII) help release nitrogen back into the soil.*


*4. Plants (II, IX) absorb nitrates from the soil for growth.*


*5. Animals (VII, IV) consume plants and return nitrogen through excretion or decay.*



(c) Two scavengers in the habitat

*Rat (VII) and Snail (IV)*


(i) Food chain in the habitat
*Plant II → Snail IV → Rat VII* *→ Decaying Matter VIII → Mushroom VI*

(d) Ecological name of the diagram

*Terrestrial ecosystem*


*(ii) One biotic and two abiotic factors*

*Biotic Factor – Plants (II, V)*

*Abiotic Factors – Soil (X), Lightning (II)*



Question 4 (Biology Concepts)

(a) Define the following terms:
*(i) Accommodation – The ability of the eye to adjust its lens shape for focusing on near and distant objects.*
*(ii) Metamorphosis – The process of transformation from a larval stage to an adult form in animals (e.g., caterpillar to butterfly).*

(b) Why is the left ventricle thicker than the right?

*The left ventricle pumps blood to the entire body under high pressure, requiring thicker muscular walls.*


(c) Why is sugar found in the urine of diabetics?

*In diabetes, excess glucose is not reabsorbed due to insufficient insulin, leading to its presence in urine.*

(d) Hormone that controls water reabsorption in the kidney

*Antidiuretic hormone (ADH)*


(e) Significance of hemoglobin in respiration

*Hemoglobin transports oxygen from the lungs to body tissues and carries carbon dioxide back for exhalation.*

WAEC 2025 MIDNIGHT QUESTION AND ANSWER  PAYMENTS!!!.

✅ALL SUBJECTS(COURSES)+PRACTICAL : ₦16,500
======================================

✅ALL SCIENCE SUBJECTS : ₦8,000
==========================

✅ALL ART SUBJECTS : ₦7,000
=======================

✅ALL COMMERCIAL SUBJECTS : ₦ 7,000
==============================

PAY INTO THE ACCOUNT BELOW
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