2024 NECO Biology Questions and Answers: Free Expo Now Available

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2024 NECO Biology Questions and Answers: Free Expo Now Available

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NECO Biology Theory (Essay) Answers

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QUESTION 1

BIOLOGY OBJ
01-10: EEDDDEEAAE
11-20: DABBCACEBD
21-30: BCECCDADAD
31-40: DDBEBAEDBC
41-50: BACABABDDE
51-60: ACDCDCCDDA

COMPLETED

NECO BIOLOGY

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

(iüi) Hydrotropism
(iv) Thigmotropism
(3aii)
(0) Loss of fertile land and decreased agricultural
productivity
(i) Increased sedimentation in water bodies,
harming aquatic ecosystems
(3bi)
Grass>Grasshopper>Lizard>Hawk
(3bi)

(4bi)
() Insulin (regulates blood sugar levels)
(1) Adrenaline (responds to stress)
(i) Growth Hormone (regulates growth
development)
(4bi)
-Amoeba: Contractile vacuole
-Hydra: Diffusion through body surface
Earthworm: Nephridia
-Grasshopper: Malpighian tubules
(4bii)
(1) Mitochondria: Generates energy for the cell
through cellular respiration
(2) Lysosomes: Contains digestive enzymes to
break down and recycle cellular waste and foreign
substances

(5bi)
(0) Fossil Record: Shows changes in species over
time, with transitional forms demonstrating
common ancestry.
(i) Comparative Anatomy: Homologous structures
(e.g., limb bones in vertebrates) indicate common
ancestry.
(ii) Molecular Biology: DNA and protein sequence
similarities among different species suggest
evolutionary relationships.
(iv) Biogeography: Distribution of species across
different geographical areas supports patterns of
evolution and migration.
(5bi)
) Hinge Joint
(i1) Ball-and-Socket Joint
(ii) Pivot Joint

(5bi)
[TABULATE]
=MONOCOT PLANTS=
() Leaf Venation; Parallel venation
(i) Number of Flower Parts; Usually in multiples of
three
=MONOCOT PLANTS=
) Leaf Venation; Reticulate (net-like) venation
(1) Number of Flower Parts; Usualy in multiples of
four or five

Solving/Typing……

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