2024 NABTEB GCE BIOLOGY: Biology (Bio) Practical NABTEB GCE Authentic Answer 2025 (3579)

(1a)

(PICK TWO ONLY)

(i) Stigma

(ii) Ovary

(iii) Pistil

(iv) Carpel

(1b)

(i) For strong bones and teeth.

(ii) For muscle and nerve functioning/energy production.

(1c)

i 2/1, c 0/0, pm 3/2, m 3/3 = 28 teeth

(1d)

Mammalia

(1e)

(i) Diverging (Concave) lenses

(ii) Converging (Convex) lenses

(1f)

(i) Right atrium

(ii) Left atrium

(iii) Right ventricle

(iv) Left ventricle

(1g)

(PICK ANY TWO)

(i) Urine

(ii) Carbon dioxide

(iii) Water vapour

(iv) Faeces

(1h)

(PICK ANY TWO)

(i) Heartbeat

(ii) Sneezing

(iii) Yawning

(iv) Coughing

(v) Constriction of pupil

(1i)

(i) Mature proglottids for easy propagation

(ii) Flattened body with a large surface area for absorption of nutrients

(1j)

(i) Vasodilation

(ii) Vasoconstriction

(1k)

(PICK ANY TWO)

(i) Duodenum

(ii) Jejunum

(iii) ileum

(1l)

(i) King

(ii) Queen

(iii) Soldiers

(iv) Workers

(v) Winged reproductives

(1m)

(PICK ANY TWO)

(i) Eggs

(i) Meat

(ii) Beans

(iv) Fish and seafood

(1n)

(PICK ANY TWO)

(i) They are not consumed or permanently altered 'copied from e x a m p l a z a . c o m free' during the reaction

(ii) They are proteins in nature

(iii) They are very specific in action

(1o)

(i) Cerebrum

(ii) Cerebellum

(iii) Hypothalamus

(iv) Medulla oblongata

(2ai)

Fig 1: Anterior view of a mammalian thoracic vertebra.

Fig 2: Anterior view of a mammalian lumbar vertebra.

(2aii)

(I) Neural spine

(II) Neural arch

(III) Transverse process

(IV) Neural canal

(V) Centrum

(VI) Prezygapophysis

(VII) Metapophysis

(VIII) Transverse process

(2b)

(I) It provides attachment for ligaments and muscles.

(III) It serves as an attachment point for muscles.

(IV) It allows for the passage of the spinal cord.

(VII) Acts as an attachment site for muscles.

(2c)

(i) It provides a framework that supports the body.

(ii) It protects vital organs such as the brain, heart, and lungs.

(iii) It facilitates movement by serving as points of attachment for muscles.

(3a)

Transverse section of dicot stem.

(3b)

(I) Epidermis

(II) Collenchyma

(III) Parenchyma

(IV) Endodermis

(V) Xylem

(VI) Pith

(VII) Cambium

(VIII) Phloem

(3ci)

(V) It helps in conduction of water and mineral salts.

(VII) Production of new xylem and phloem cells, contributing to the increase of girth or thickness of the root and stem.

(VIII) Transport of sugars and amino acids from leaves to other parts of the plant.

(3cii)

(IN TABULAR FORM)

Mineral in Animal:

(i) Calcium

(ii) Iron

(iii) Iodine

Function:

(i) For strong bones and teeth

(ii) Synthesis of hemoglobin

(iii) Proper functioning of the thyroid gland

Deficiency Symptoms:

(i) Rickets

(ii) Anemia

(iii) Goiter

(4a)
Longitudinal section of a mango fruit.

(4b)
(i) Fruit Stalk
(ii) Epicarp
(iii) Endocarp
(iv) Seed Coat
(v) Seed kernel

(4ci)
Drupe.

(4cii)
Its cultivation and trade provides income for farmers

(4ciii)
(IN TABULAR FORM)

FRUIT:
(i) The fruit develops from the ovary of a flower.
(ii) It usually contains seeds within it.
(iii) Fruits help in the dispersal of seeds.

SEED:
(i) The seed develops from the ovule.
(ii) It is the part that can germinate into a new 'copied from e x a m p l a z a . c o m free' plant.
(iii) Seeds help in the reproduction of plants.

(5a)

(i) Ecosystem is the biological community that comprises biotic (living) components and abiotic (non-living) components.

(ii) Habitat is the natural dwelling place of an organism.

(iii) Food chain is defined as the sequence in which energy and nutrients are transferred from one organism to another within an ecosystem.

(iv) A food web is the complicated feeding relationship in which a number of food chains are linked together.

(5bi)

Water Leaf ---> Rabbit ---> Snake ---> Man

(5bii)

The rabbit population would increase drastically, which could lead to overgrazing of water leaf, potentially depleting the plant population and disrupting the ecosystem balance. Additionally, the organisms that prey on snakes would be affected, potentially leading to a decline in their population due to the lack of food.