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description2018 Neco Biology Objective and Essay Questions and Answers | Biology Expo Empty2018 Neco Biology Objective and Essay Questions and Answers | Biology Expo

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Biology obj









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21-30 AEECBCADAE



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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


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.


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


4bi) effect of over crowding are ;
Aggressive behavior 
State of unrest 
Decrease in reproductive ability



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). ..






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





(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
=======================






Thursday 31st May 2018

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Last edited by Emmi on Thu May 31, 2018 10:56 am; edited 3 times in total

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