Confirmed Biology Objective and theory now Available 10am-12:30pm

Thursday 31st May​✅

Objective & Essay – Biology
​10:00am – 12:30pm​✔
*NECO 2018 – BIOLOGY*

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). ..

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.

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

3ai)
i) Liver fibrosis

ii) hepatitis

iii)hemochromatosis

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

4A

OSMOSIS :: a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.

PLASMOLYSIS contraction of the protoplast of a plant cell as a result of loss of water from the cell.

Diffusion is the net movement of molecules or atoms from a region of high concentration to a region of low concentration as a result of random motion of the molecules or atoms

*S_S* SOLUTION TEAM
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). … In an ecosystem, each organism has its own niche or role to play.
3aii)
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 Centrosome
BIOLOGY OBJ:
1-10: BBEADBEEEC
11-20: DADBDCDDDB
21-30: ADECBDADEC
31-40: DADAAAACBA
41-50: BCEABCCCDB
51-60: EABBDDCCBB

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
G2 solution

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).

G2 solution

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.

G2 solution
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
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
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
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
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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