NECO Biology Obj And Essay/Theory Solution Questions and Answer – JUNE/JULY 2018 Expo Runz.

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BIOLOGY OBJ:

1-10: BBEADBEEEC

11-20: DADBDCDDDB

21-30: ADECBDADEC

31-40: DADAAAACBA

41-50: BCEABCCCDB

51-60: EABBDDCCBB

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1ai)

I. Plants need sunlight for the process of photosynthesis.

ii. Plants use chlorophyll and light to make food.

1b)

i.humerus

ii.radius

iii.ulna

iv.the ball and socket shoulder joint

v. Scapula

1c)

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

1d)

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).

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2ai 

 a 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).

2aiii

a 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 an organism which gets its energy from dead and decaying organic matter. This may be decaying pieces of plants or animals.

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 malcrop allow

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(3ai)

Conservation can be defined as the judicious use of natural resources to ensure their availability and preserve the quality of the environment. 

(3aii)

It ensures continuous source of plant nutrient.

It ensures source of water and reservoir for soil nutrient. 

To ensure preservation of soil fertility

To ensure sources of raw materials for industries

To ensure medium for agriculture.{pick any four}

(3bii)

Crop rotation is a system of farming where a crop is cultivated in a piece of land in a definite sequence in such a way that a deep rooted crop succeeds a shallow feeder and the shallow feeder succeeds a legume. 

(3bii)

It ensures maximal use of the soil nutrient

It helps to renew soil fertility by the activities of the leguminous  crop

3b)

CLICK HERE FOR THE DIAGRAM

3ci)

i)Parenchyma

ii)Collenchyma

iii)Wood(Xlem)

3cii)

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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4ai) 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

4ai) 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 

4aii) 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

4aiii) plasmolysis is defined as the outward movement or flow of water from a living cell when they are place in an hyoertonic solution

4bi) effect of over crowding are ;

Aggressive behavior 

State of unrest 

Decrease in reproductive ability

4bii) conservation of wild life are;

Indiscriminate killing of wildlife should be discouraged 

Deforestation which destroy the habitat of animal should be discouraged 

Killing of young developing animals should be allow

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