2024 NECO BIOLOGY: 2024 NECO BIOLOGY ANSWERS (7972)

BIOLOGY OBJ
1-10: ECDADACEAD
11-20: CAACCDDEDC
21-30: CCCAAEEDED
31-40: BBCEDACEEA
41-50: DDDCDCADAE
51-60: DCCEAADADB

You are asked to answer only three(3) questions. We answered all 1,2,3,4,5.
Pick only three(3) please.
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(1a)
Ensure your drawing is (8-10cm)



(1b)

 
(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

(1bii)

(ii) Mutualis: This is the relationship between two organisms in which both benefited from the association.

(1ci)

(i) Epigeal germination
(ii) Hypogea germination

(1cii)

(i) Amoeba
(ii) Paramecium
(iii) Euglena

(1ciii)

(i) Salting
(ii) Smoking
(iii) Freezing

==============

(2a)
Symptoms:
(i) High fever
(ii) Coughing
(iii) Sneezing
(iv) Headache and body pain

Prevention:
(i) Regular hand washing
(ii) Maintenance of social distance
(iii) Use of hand sanitizer with high alcoholic content
(iv) Avoidance of handshakes

(2aii)
(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

(2b)
DIAGRAM: 

(2bii)
(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.
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(3ai)
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.

(3aii)
Haemolysis: This can be defined as the breaking down of the red blood cells or corpuscle due to high passage of water into it

(3aiii)
Deforestation: This can be defined as the indiscriminate falling of forest trees to decrease forest in an area.

(3b)
(i) Quadrat
(ii) Sweep net
(iii) Role (for transact method)
(iv) Thermometer

(3c)
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.

(3di)
Calyx: it protects the flower which is in the bud

(3dii)
Corolla: it attract pollinators.
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(4a)
DIAGRAM (8-10cm Long)


(4bi)
Mitochondrion: It produces energy in the cell

(4bii)
Ribosome: It brings about protein synthesis in the cell

(4biii)
(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

(4biv)
(i) They have light weight
(ii) They have hairy structures
(iii) They are small in size
(iv) Possession of parachute
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(5a)
DIAGRAM: 

[Tabulate it if you can't draw]

F1 generation
|x|W|W|
|w|Ww|Ww|
|w|Ww|Ww|

F2 generation
|x|W|w|
|W|Ww|Ww|
|w|Ww|ww|

(5b)
(i) Planting cover crops
(ii) Construction of good drainage system
(iii) Avoid dumping refuse into the drainage system
(iv) Strict laws in the disposal of refuse

(5c)
Fertilization in flowing plants leads to the production of seeds which are capable of germinating into new plant. In this case the pollen grains (male reproductive gamete) is transferred onto the stigma where it is passed into the ovary for pollination to take place and then to the ovule leading to the formation of seed.

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