You are asked to answer only three(3) questions. We answered all 1,2,3,4,5.
Pick only three(3) please.
(i) Predation: this is a relationship between two organism in which one feeds on the other organisms. The one feeding on the other is called the predator while the one they are feeding on is known as the prey
(ii) Mutualis: This is the relationship between two organisms in which both benefited from the association.
(i) Epigeal germination
(ii) Hypogea germination
(i) High fever
(iv) Headache and body pain
(i) Regular hand washing
(ii) Maintenance of social distance
(iii) Use of hand sanitizer with high alcoholic content
(iv) Avoidance of handshakes
(i) They have two seed leaves or cotyledon
(ii) Their floral parts are in four or fives
(iii) Their vascular bundles are in concentric circles
(iv) Their root develop from the radicle
(i) Possession of the leaves that helps in floatation
(ii) their stomata are located on the surface of the plant for easy gaseous exchange
(iii) Possession of little or no root system.
Pathogen: This is an organism causing disease to its host, with the severity of the disease symptoms referred to as virulence. This is defined as any organisms capable of causing diseases.
Haemolysis: This can be defined as the breaking down of the red blood cells or corpuscle due to high passage of water into it
Deforestation: This can be defined as the indiscriminate falling of forest trees to decrease forest in an area.
(ii) Sweep net
(iii) Role (for transact method)
The pinna collects sounds waves in air and pass them through external auditory canal. The waves cause the vibration of the tympanic membrane which passed on to the ear Ossicles that amplify them. The round oval window vibrates and passes the waves into the cavity of the inner ear or cochlea where the perilymph and endolymph vibrate the sensory nerve cells vibrate and stimulate the auditory nerve cells which then transmit the impulses to the brain for interpretation.
Calyx: it protects the flower which is in the bud
Corolla: it attract pollinators.
2021 NECO BIOLOGY Questions & Answers (ESSAY, OBJ, THEORY, PRACTICALS ETC)
DIAGRAM (8-10cm Long)
Mitochondrion: It produces energy in the cell
Ribosome: It brings about protein synthesis in the cell
(i) They are proteinous in nature
(ii) It alters the rate of chemical reaction
(iii) They remain chemically unchanged
(iv) They are specific in function
(i) They have light weight
(ii) They have hairy structures
(iii) They are small in size
(iv) Possession of parachute
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2021 EXAM DATES
NABTEB: 14th June - 9th July
NECO: 5th July - 16th August
WAEC: 16th August - 30th Sept