2018 waec biology answer
VERIFIED BIO OBJ:
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5a)
Evaporation
Condensation
Precipitation
Collection
Transportation
i)PH is pH meter
ii)Light intensity is photometer
iii)Turbidity is nephelometer or turbidimeter,
5b)Glucose
I. Glucose is the main energy source for body cells.
Ii. glucose plays a
structural role with its inclusion in carbohydrate additions to proteins.
iii) Oxygen
I. To burn food for the release of energy stored
Ii. For cellular respiration
5c) Nastism are nastic movements which are non-directional responses to stimuli (e.g. temperature, humidity, light irradiance), and
are usually associated with plants.
4a)
Mendel's 1st Law of inheritance States that genes are responsible for the development of the individual and that they are independently transmitted from one generation to another without undergoing ant change
4bi
1. the process by which different kinds of living organism are believed to have developed from earlier forms during the history of the earth
.
2. the gradual development of something.
3. the giving off of a gaseous product, or of heat.
4. a pattern of movements or manoeuvres.
5. the extraction of a root from a given quantity..
6ai)
Chemosynthesis is the biological conversion of one or more carbon-containing molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic compounds (e.g., hydrogen gas, hydrogen sulfide) or methane as a source of energy, rather than sunlight
6aii)
i)Bacteria
ii)methanogenic archaea
6b)
Nitrogen — 78 percent.
Oxygen — 21 percent.
Argon — 0.93 percent.
Carbon dioxide — 0.04 percent.
1ai) sperm cell is the male reproductive cell that is expelled along with the seminal fluid or semen when a man ejaculates. In humans, spermatozoa determine the gender of the baby-to-be, which means that they can carry either the X or the Y chromosome.
2 a )
i ) carbon dioxide
ii) Nitrogen
2 b )
i ) CO 2 is used by plants to photosynthesize carbohydrates .
ii) Nitrogen is a major component of chhlorophyll
2 ci )
Variegated leaf is a leaf that has green parts ( where the cells contain chlorophyll) and non green parts ( where there is no chlorophyll)
.
2 cii )
The green parts
2 ciii )
i ) The parts without chlorophyll do not photosynthesise
ii) the cells contain chlorophyll
3bi water and .......
ii air and sunlight
3ai)
renewable resource is a resourcewhich can be used repeatedly and replaced naturally..
3aii)
nonrenewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption.
3bi)
i)oxygen
ii)fresh water
3bii)
I)oil
ii)natural gas
3c)
i)Regulated and Planned Cutting of Trees.
ii)Control over Forest Fire.
iii)Reforestation and Afforestation.
iv)Check over Forest Clearance for Agricultural and Habitation Purposes.
v)Proper Utilisation of Forest and Forests Products.
3d)
4aI)
A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases.
___________"""""________
4aii) HYBRID
In biology, a hybrid, or crossbreed, is the result of combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction.
4ci height of plant
ii size of various parts of the plant such as stems, leaves, flowers, fruits
iii color of parts of plants such as green, white and brown of leaves, stem and root
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01-BDDCCBCDBC
11-ADCDCCAACC
21-CAABBBBCBC
31-CABCCACDAA
41-ABBDDADDAB
5a)
Evaporation
Condensation
Precipitation
Collection
Transportation
i)PH is pH meter
ii)Light intensity is photometer
iii)Turbidity is nephelometer or turbidimeter,
5b)Glucose
I. Glucose is the main energy source for body cells.
Ii. glucose plays a
structural role with its inclusion in carbohydrate additions to proteins.
iii) Oxygen
I. To burn food for the release of energy stored
Ii. For cellular respiration
5c) Nastism are nastic movements which are non-directional responses to stimuli (e.g. temperature, humidity, light irradiance), and
are usually associated with plants.
4a)
Mendel's 1st Law of inheritance States that genes are responsible for the development of the individual and that they are independently transmitted from one generation to another without undergoing ant change
4bi
1. the process by which different kinds of living organism are believed to have developed from earlier forms during the history of the earth
.
2. the gradual development of something.
3. the giving off of a gaseous product, or of heat.
4. a pattern of movements or manoeuvres.
5. the extraction of a root from a given quantity..
6ai)
Chemosynthesis is the biological conversion of one or more carbon-containing molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic compounds (e.g., hydrogen gas, hydrogen sulfide) or methane as a source of energy, rather than sunlight
6aii)
i)Bacteria
ii)methanogenic archaea
6b)
Nitrogen — 78 percent.
Oxygen — 21 percent.
Argon — 0.93 percent.
Carbon dioxide — 0.04 percent.
1ai) sperm cell is the male reproductive cell that is expelled along with the seminal fluid or semen when a man ejaculates. In humans, spermatozoa determine the gender of the baby-to-be, which means that they can carry either the X or the Y chromosome.
2 a )
i ) carbon dioxide
ii) Nitrogen
2 b )
i ) CO 2 is used by plants to photosynthesize carbohydrates .
ii) Nitrogen is a major component of chhlorophyll
2 ci )
Variegated leaf is a leaf that has green parts ( where the cells contain chlorophyll) and non green parts ( where there is no chlorophyll)
.
2 cii )
The green parts
2 ciii )
i ) The parts without chlorophyll do not photosynthesise
ii) the cells contain chlorophyll
3bi water and .......
ii air and sunlight
3ai)
renewable resource is a resourcewhich can be used repeatedly and replaced naturally..
3aii)
nonrenewable resource is a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption.
3bi)
i)oxygen
ii)fresh water
3bii)
I)oil
ii)natural gas
3c)
i)Regulated and Planned Cutting of Trees.
ii)Control over Forest Fire.
iii)Reforestation and Afforestation.
iv)Check over Forest Clearance for Agricultural and Habitation Purposes.
v)Proper Utilisation of Forest and Forests Products.
3d)
4aI)
A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases.
___________"""""________
4aii) HYBRID
In biology, a hybrid, or crossbreed, is the result of combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction.
4ci height of plant
ii size of various parts of the plant such as stems, leaves, flowers, fruits
iii color of parts of plants such as green, white and brown of leaves, stem and root
Keep refreshing page every 5, 5minutes interval...
We are now working out the answers
Staytune!
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