NECO 2024 Biology (OBJ/ESSAY) Questions and Answers 

2024 NECO BIOLOGY (ESSAY) QUESTIONS AND ANSWERS:

BIOLOGY ESSAY

NUMBER 1

(1ai)
(i) Producers
(ii) Consumers
(iii) Decomposers

(1aii)
(i) Mandibles
(ii) Maxillae
(iii) Labium

(1bi)
(i) Filtration: Blood enters the glomerulus through the afferent arteriole and is filtered under pressure in the Bowman’s capsule, removing water, ions, glucose, amino acids, and waste products like urea from the blood.
(ii) Reabsorption: As the filtrate moves through the proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct, essential substances such as water, glucose, and ions are reabsorbed back into the bloodstream.
(iii) Secretion: Additional waste products and excess ions are secreted into the tubule from the surrounding capillaries, ensuring the removal of substances not initially filtered or those that need to be regulated.
The final product, urine, collects in the renal pelvis, flows through the ureters to the bladder, and is excreted via the urethra.

(1bii)
(i) Malleus (Hammer)
(ii) Incus (Anvil)

(1biii)
PHOTOSYNTHESIS
-Converts carbon dioxide and water into glucose and oxygen using sunlight
-Only occurs in the presence of light (daytime)

RESPIRATION
-Converts glucose and oxygen into carbon dioxide, water, and energy (ATP)
-Occurs continuously, day and night

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NUMBER 2

(2ai)
(i) Wings
(ii) Hollow bones
(iii) Lightweight skeleton
(iv) Powerful muscles

(2aii)
-Pollen from anther (male part) is transferred to stigma (female part)
-Pollination occurs through agents like bees, butterflies, wind, or water
-Fertilization occurs when pollen germinates and sperm reaches the egg
-Seed formation and fruit development follow successful pollination

(2bi)
(i) Sticky tongue
(ii) Specialized teeth
(iii) Webbed feet

(2bii)
[TABULATE]

=ARTERIES=
(i) Carry blood away from the heart
(ii) No valves (except for the pulmonary artery and aorta)
(iii) Narrower lumen compared to veins
(iv) Thick, muscular, and elastic walls

=VEINS=
(i) Carry blood towards the heart
(ii) Valves present to prevent backflow of blood
(iii) Wider lumen compared to arteries
(iv) Thinner, less muscular, and less elastic walls

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NUMBER 3

(3ai)
(i) Phototropism
(ii) Geotropism
(iii) Hydrotropism
(iv) Thigmotropism

(3aii)
(i) Loss of fertile land and decreased agricultural productivity
(ii) Increased sedimentation in water bodies, harming aquatic ecosystems

(3bi)
Grass>Grasshopper>Lizard>Hawk

(3bii) Diagram below 👇

(3biii)
(i) Oxygen (O₂)
(ii) Glucose (C₆H₁₂O₆)

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