2024 NECO Biology Answers:
BIOLOGY OBJ
01-10: EEDDDEEAAE
11-20: DABBCACEBD
21-30: BCECCDADAD
31-40: DDBEBAEDBC
41-50: BACABABDDE
51-60: ACDCDCCDDA
COMPLETED
QUESTION PAPERS:
NECO BIOLOGY THEORY ANSWERS
NUMBER ONE
(1ai)
(PICK ANY THREE)
(i) Producers
(ii) Consumers
(iii) Decomposers
(iv) Parasites
(v) Symbionts
(1aii)
(i) Mandibles
(ii) Maxillae
(iii) Labium
(1bi)
(i) Ultrafiltration: The initial step in blood filtration occurs in the glomerulus of a nephron, where pressure causes water, ions, glucose, urea, and small proteins to pass out of the blood vessels into the Bowman’s capsule (glomerular filtrate).
(ii) Reabsorption: As the glomerular filtrate moves through the renal tubules, essential nutrients, glucose, water, and most ions are reabsorbed back into the bloodstream. This selectively conserves nutrients while eliminating waste products.
(iii) Secretion: Some substances, such as hydrogen ions (H+), potassium (K+), creatinine, and urea, are actively secreted from the bloodstream into the renal tubules, further concentrating the urine.
(iv) Concentration: The collecting duct and loop of Henle regulate the final water and ion balance of the urine, ensuring that waste products are sufficiently concentrated.
(1bii)
(PICK ANY TWO)
(i) Malleus
(ii) Incus
(iii) Stapes
(iv) Stapedius
(1biii)
[in a Tabular form]
-Photosynthesis-
(PICK ANY TWO)
(i) Process that uses sunlight to convert carbon dioxide and water into glucose
(ii) Occurs in plant cells, algae, and some bacteria
(iii) Releases oxygen as a byproduct
(iv) Builds organic molecules (anabolism)
(v) Takes place during the day in sunlight
-Respiration-
(PICK ANY TWO)
(i) Process that breaks down glucose to release energy
(ii) Occurs in all living cells
(iii) Consumes oxygen
(iv) Breaks down organic molecules (catabolism)
(v) Takes place continuously, day and night
NUMBER TWO
(2ai)
(PICK ANY FOUR)
(i) Lightweight bones
(ii) Strong flight muscles
(iii) Streamlined body shape
(iv) Hollow feathers for insulation and buoyancy
(v) Wings modified from forelimbs
(vi) Air sacs to reduce body density
(2aii)
(i) Pollination vector (e.g., insect, bird, wind) comes into contact with the flower.
(ii) Pollen grains from the another stick to the vector’s body.
(iii) The vector carries the pollen to another flower of the same species.
(iv) Pollen grains are transferred to the stigma of the flower.
(v) If pollination is successful, the pollen tube germinates and grows down the style, delivering sperm cells to the ovary.
(vi) Fertilization occurs when a sperm cell fuses with an egg cell in the ovary, resulting in seed formation.
(2bi)
(PICK ANY THREE)
(i) Sticky tongue for catching insects
(ii) Large, bulging eyes for increased field of vision
(iii) Camouflage skin for blending into the environment
(iv) Nocturnal habits to avoid predators
(v) Movable eyelids for protection
(vi) Glandular skin for defense against predators
(2bii)
[In a Tabular form]
-Arteries-
(PICK ANY FOUR)
(i) Carry blood away from the heart
(ii) Thicker, more muscular walls due to higher blood pressure
(iii) Narrower lumen (inner diameter)
(iv) Elastic recoil to maintain blood pressure
(v) Provide nutrients, oxygen, and hormones to tissues
(vi) Oxygenated blood, except for pulmonary arteries
(vii) High blood pressure
-Veins-
(PICK ANY FOUR)
(i) Carry blood towards the heart
(ii) Thinner, less muscular walls due to lower blood pressure
(iii) Wider lumen
(iv) Valves to prevent backflow of blood
(v) Collect deoxygenated blood from tissues
(vi) Return blood to the heart for reoxygenation
(vii) Low blood pressure.
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