NECO – BIOLOGY – ANSWER
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Bio – Obj

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You Are To Answer Three ( 3 )

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2 ai)

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.

2 aii )

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 ) .

2 aiii)

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 .

2 aiv )

A saprophyte or saprotroph is anorganism which gets its energy from dead and decaying organic matter .

2 bi)

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

2 bii )

i ) Biceps

ii) Triceps

2 biii)

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

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4 ai)

diffusion is defined as the process by which molecules or ion move from a region of high concentrations to a region of low concentration until they are evenly distributed

4 aii )

osmosis is defined as the process by which water molecules move from a region of dilute or wicker solution to stronger solution through a selectively or permeable membrane

4 aiii)

plasmolysis is defined as the outward movement or flow of water from a living cell when they are place in an hyoertonic solution

4 b )

i ) lack of sleep

ii) lack of privacy

iii ) poor hygiene

iv ) lost if physical contact

4 bii )

I ) prevention of pollution to prevent the destruction of aquatic life

ii) prohibition of killing or poaching of animals in game reserve

4 biii)

I ) dog

ii) horse

4 ci )

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 .

4 cii )

i ) cockroaches

ii) termites

4 ciii )

i ) Tomatoes

ii) Oranges

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3 ai)

i ) Liver cancer

ii) Hepatitis

iii ) Cirrhosis

3 aii )

– 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

– Animal cell –

i ) Absence of cell wall

ii) Absence of chloroplasts

iii ) Presence of dense cytoplasm

iv ) Presence of small vacuole

v ) Presence of Center some

3 b )

CLICK HERE FOR THE DIAGRAM

3 ci )

i ) Parenchyma

ii) Collenchyma

iii ) Wood( Xlem )

3 cii )

i ) They are able to regulate their inner body temperature to the temperature of the

environment .

ii) They have scaly skins but absence of hair or fur .

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1 ai)

i ) Plants need sunlight for the process of photosynthesis .

ii) Plants use chlorophyll and light to make food .

1 b )

i ) Humerus

ii) Radius

iii ) Ulna

iv ) he ball and socket shoulder joint

v ) Scapula

1 c )

I ) they perform the defence duty

ii) they under go the most labour within

iii ) worker are tasked with the digestion of cellulose in food

1 d )

An ecosystem includes all of the living things ( plants , animals and organisms ) in a given area , interacting with each other , and also with their non – living environments ( weather , earth, sun , soil, climate, atmosphere ) .

1 e )

CLICK HERE FOR THE DIAGRAM

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Completed

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