Neco 2018 Biology (Obj X Essay)
Biology
Answers – June/July Expo
Neco 2018 Biology (Obj X Essay)
Answers 30/05/2018
[5/31, 9:56 AM] Fineloaded.com.ng:
1ai
Sunlight;- The sunlight is used to split water into hydrogen ions and hydroxyl ions in a process called photolysis.
Chlorophyll;- The chlorophyll represent sites where food can by synthesized and it helps to trap solar energy and convert it to chemical energy
[5/31, 9:56 AM] Fineloaded.com.ng:
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.
[5/31, 9:56 AM] Fineloaded.com.ng:
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
[5/31, 9:56 AM] Fineloaded.com.ng:
1ai
Sunlight;- The sunlight is used to split water into hydrogen ions and hydroxyl ions in a process called photolysis.
Chlorophyll;- The chlorophyll represent sites where food can by synthesized and it helps to trap solar energy and convert it to chemical energy
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
: 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.
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
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
4aiii) plasmolysis is defined as the outward movement or flow of water from a living cell when they are place in an hyoertonic solution
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
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