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NECO 2024/2025 BIOLOGY Syllabus/Brochure Questions and Answers

NECO 2024 BIOLOGY ANSWERS Bio OBJ: 1-10 BBEADBEEEC 11-20 DADBDCDDDB 21-30 ADECBDADEC 31-40 DADAAAACBA 41-50 BCEABCECDD 51-60 EABBDDCCBB (1a) (i) Sunlight: It is source of energy for during photosynthesis (ii) Chlorophyl: It traps solar energy and coverts it to chemical energy during photosynthesis (1b) (i) Humerus (ii) Radius (iii) Ulna (iv) Scapula (v) The ball and socket joint (1c) (i) They help in gathering food for the caste (ii) circulating and maintaining the colony’s pheromones and food among each other via trophallaxis, (iii) They help in tending to the eggs and nymphs (iv) They help in taking care of the queen and king (v) They help in constructing or repairing the nest, tunnels, galleries, feeding tunnels (1d) Ecosystem is a community of interaction between organisms and their environment. (1e) DRAWING (2ai) gene is a sequence of DNA or RNA which codes for a molecule that has a function . During gene expression , the DNA is first copied into RNA . (2aii) Implantation : The act of setting in firmly . In embryology , implantation refers specifically to the attachment of the fertilized egg to the uterine lining , which occurs approximately 6 or 7 days after conception (fertilization) . (2aii) group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. The species is the principal natural taxonomic unit , ranking below a genus and denoted by a Latin binomial , e. g . Homo sapiens . (2aiv) A saprophyte or saprotroph is anorganism which gets its energy from dead and decaying organic matter. (2bi) (i) It gives support and shape to the body (ii) It helps in the production of white blood cells (iii) It aids free movements (iv) It helps in the attachment of muscles (2bii) (i) Biceps (ii) Triceps (2biii) (i) Lipase (ii) Maltase (iii) Amylase FUNCTION: -Lipase breaks down dietary fats into smaller molecules called fatty acids and glycerol. -Maltase converts maltose to glucose -Amylase converts starch to maltose (3a) (i) Diabetes modditues (ii) Gell stone (iii) infective hepatitis (iv) cancer of the Liver (3aii) TABULATE: Under Plant cell (i) presence of cell wall (ii) presence of chloroplast (iii) Presence of sparse cytoplasm (iv) presence of small vacuole (v) Absence of centrosome Under Animal cell (i) Absence of cell wall (ii) Absence of chloroplasts (iii) Presence of dense cytoplasm (iv) Presence of small vacuole (v) Presence of Centrosome (3b) DRAW THE DIAGRAM (3ci) (i) Parenchyma (ii) Collenchyma (3cii) (i) it ensure fertilization takes place intenolsy (ii) the released the eggs and despite on the egg as they move down the widuct (4ai) Diffusion is the movement of (molecules atoms ions) from a region in which they are in higher concentration until an equilibrium is established (4ai) Osmosis this is a spontaneous movement of water molecules through a semi-permeable membrane into a region of higher solute concentration (4aii) Plasmolysis this is a shrinking away of protoplam linear from a cell wall of a paintor bacterium due to water loss from osmosis (4b) (i) lack of sleep (ii) lack of privacy (iii) poor hygiene (iv) lost if physical contact (4bii) (I)prevention of pollution to prevent the destruction of aquatic life (ii)prohibition of killing or poaching of animals in game reserve (4biii) (I)dog (ii)horse (4ci) Metamorphosis is a biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal’s body structure through cell growth and differentiation. (4cii) (i)cockroaches (ii)termites (4ciii) (i)Tomatoes (ii)Oranges (5a) DRAW THE DIAGRAM (5b) TABULATE (DRAW A TABLE) (i) Mouth | Stationary gland (Ptyodira) (ii) Stomach | Renin (iii) Small Intestine | (Lipase) (Ellipsis) (Maltese)
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