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Author Topic: 2018/2019 WAEC WASSCE BIOLOGY Questions And Answer Expo/Runs  (Read 3935 times)

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Offline JEFFREY96

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2018/2019 WAEC WASSCE BIOLOGY Questions And Answer Expo/Runs
« on: April 18, 2018, 08:54:12 pm »
Real 2018/2019 WAEC WASSCE BIOLOGY Real Questions And Answers  Expo Runs Runz

===================
Thursday, 19th April, 2018

Biology 2 (Essay) – 2:00 p.m. – 3:40 p.m.

Biology 1 (Objective) – 3:40 p.m. – 4:30 p.m.
====================

Like CLICK HERE for the QUESTIONS & ANSWERS.

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    Offline JEFFREY96

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    *BIOLOGY ANSWERS*

    1i) 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.

    ii)Palisade cells are found in the mesophyll of a leaf and their main function is the absorption of light so that photosynthesis can take place. The palisade mesophyll consists of chloroplasts with chlorophyll that absorb the light energy.

    ==========================

    2a)
    i)carbon dioxide 
    ii)Nitrogen 

    2b)
    i)CO2 is used by plants to photosynthesize carbohydrates. 
    ii)Nitrogen is a major component of chhlorophyll

    2ci)
    Variegated leaf is a leaf that has green parts (where the cells contain chlorophyll) and non green parts (where there is no chlorophyll).

    2cii)
    The green parts

    2ciii)
    i)The parts without chlorophyll do not photosynthesise 
    ii)the cells contain chlorophyll

    ===============================

    4a)
     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.



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    Offline passino

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    Jeffrey,  is it complete?.
    Passino

    Offline Yonnie

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    is not complete boss

    Offline Anokye Frederick

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    Pls the objectives

    Offline JEFFREY96

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    Jeffrey,  is it complete?.

    (2a)
    (i) carbon dioxide
    (ii) Nitrogen

    (2b)
    (i) CO 2 is used by plants to photosynthesize carbohydrates (ii) Nitrogen is a major component of chhlorophyll

    (2ci)
    Variegated leaf is a leaf that has green parts (where the cells contain chlorophyll) and non green parts (where there is no chlorophyll).

    (2cii)
    The green parts

    (2ciii)
    (i) The parts without chlorophyll do not photosynthesise
    (ii) The cells contain chlorophyll

    (2civ) Nitrogen

    (2d)
    Holozoic:
    Human

    Parasitic:
    Tapeworm; Venus flytrap

    Symbiotic:
    Lichen

    Saorophytic:
    Rhizopus; mushroom; housefly.

    Autotropic:
    Spirogyra; waterleaf plant; elephant grass.

    ======================================



    (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.
    (v)Check over forest clearance for agricultural and habitation Purposes.
    (iv)Proper Utilisation of Forest and Forests Products.

    (3d)

    ====================================



    (4ai)
    Gene is the discrete unit of inheritance which are found in the chromosomes of all cell.

    (4aii)
    A hybrid is an offspring obtained from the cross-breeding of the species that are not closely related.

    (4aiii)
    Trait is the characteristic factor of an individual which are hereditary.

    (4b)
    Draw the diagram
    Phenotyoic ratio= 3:1
    Genotypic ratio= 1:2:1

    (4c)
    The four transmittable characters in plants are:
    -Height
    -Colour
    -Shape of fruit
    -Size of Leaf
       
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    Offline JEFFREY96

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    Pls the objectives
    Biology- Obj
    1 BDDCCBCDBC
    11ADCDCCAACC
    21 CAABBBBCBC
    31 CABCCACDAA
    41 ABBDDADDAB
    Biology- Ans
    ============================
    ============================
    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.
    6c )
    i ) They are composed of relatively few species of plants
    ii) The salt level of the habitat is high
    iii ) High flooding rate
    iv ) extreme temperature and salinity fluctuations .
    6cii )
    Roots of salt marsh plants help stabilize the sandy substrate and trap and hold
    nutrients and detritus that flow through with each tidal cycle. This detritus trap
    helps feed bacteria , algae, and invertebrates . These root tangles also provide
    critical refuge for small fish and other animals.
    6d)
    i ) Pulmonary Tuberculosis
    ii) Cholera
    iii ) Pertussis
    iv ) Salmonellosis :
    6dii)
    i ) food poisoning
    ii) food spoilage
    iii ) Low market value of food
    6e )
    the person need plenty of rest and diet rich in protein, fruits an vegetables and
    take plenty water
    6f )
    Tabulate
    Tillage
    i ) the soil is prepared mammally or mechanically
    ii) conserves soil nutrients
    iii ) good for farm practise
    Bush Burning
    i ) fire is used to remove plants
    ii) destroyes soil nutrients
    iii ) a bad farm practise
    ============================
    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.
    v) Check over Forest Clearance for Agricultural and Habitation Purposes.
    iv ) Proper Utilisation of Forest and Forests Products .
    3d)
    i ) increases soil nutrients
    ii) increases soil air
    iii ) improve soil structure
    iv ) does not corrupt the soil
    ============================
    2a)
    i ) carbon dioxide
    ii) Nitrogen
    2b)
    i ) CO 2 is used by plants to photosynthesize carbohydrates.
    ii) Nitrogen is a major component of chhlorophyll
    2ci)
    Variegated leaf is a leaf that has green parts ( where the cells contain
    chlorophyll) and non green parts ( where there is no chlorophyll) .
    2cii )
    The green parts
    2ciii)
    i ) The parts without chlorophyll do not photosynthesise
    ii) the cells contain chlorophyll
    2civ )
    Magnesium
    2d)
    Fill The Table
    Tabulate
    i ) Halozoic - Human , venus fly trap
    ii) parasitic - tape worm, Venus fly trap
    iii ) symbiotic - lichen
    iv ) sapraphytic- Rhizopus ,mushroom , housefly
    v) autotrophic- spirogyra , water leaf plant, elephant grass
    ============================
    Completed
       
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    Offline tonye19

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    Biology- Obj
    1 BDDCCBCDBC
    11ADCDCCAACC
    21 CAABBBBCBC
    31 CABCCACDAA
    41 ABBDDADDAB
    Biology- Ans
    ============================
    ============================
    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.
    6c )
    i ) They are composed of relatively few species of plants
    ii) The salt level of the habitat is high
    iii ) High flooding rate
    iv ) extreme temperature and salinity fluctuations .
    6cii )
    Roots of salt marsh plants help stabilize the sandy substrate and trap and hold
    nutrients and detritus that flow through with each tidal cycle. This detritus trap
    helps feed bacteria , algae, and invertebrates . These root tangles also provide
    critical refuge for small fish and other animals.
    6d)
    i ) Pulmonary Tuberculosis
    ii) Cholera
    iii ) Pertussis
    iv ) Salmonellosis :
    6dii)
    i ) food poisoning
    ii) food spoilage
    iii ) Low market value of food
    6e )
    the person need plenty of rest and diet rich in protein, fruits an vegetables and
    take plenty water
    6f )
    Tabulate
    Tillage
    i ) the soil is prepared mammally or mechanically
    ii) conserves soil nutrients
    iii ) good for farm practise
    Bush Burning
    i ) fire is used to remove plants
    ii) destroyes soil nutrients
    iii ) a bad farm practise
    ============================
    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.
    v) Check over Forest Clearance for Agricultural and Habitation Purposes.
    iv ) Proper Utilisation of Forest and Forests Products .
    3d)
    i ) increases soil nutrients
    ii) increases soil air
    iii ) improve soil structure
    iv ) does not corrupt the soil
    ============================
    2a)
    i ) carbon dioxide
    ii) Nitrogen
    2b)
    i ) CO 2 is used by plants to photosynthesize carbohydrates.
    ii) Nitrogen is a major component of chhlorophyll
    2ci)
    Variegated leaf is a leaf that has green parts ( where the cells contain
    chlorophyll) and non green parts ( where there is no chlorophyll) .
    2cii )
    The green parts
    2ciii)
    i ) The parts without chlorophyll do not photosynthesise
    ii) the cells contain chlorophyll
    2civ )
    Magnesium
    2d)
    Fill The Table
    Tabulate
    i ) Halozoic - Human , venus fly trap
    ii) parasitic - tape worm, Venus fly trap
    iii ) symbiotic - lichen
    iv ) sapraphytic- Rhizopus ,mushroom , housefly
    v) autotrophic- spirogyra , water leaf plant, elephant grass
    ============================
    Completed

    thank you Boss
    you are a huge blessing

    Offline handilanrio

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    Biology- Ans
    1 ai)
    A sperm cell consists of a head, middle piece and a whip- like tail . At the anterior end of the head is a structure called Acrosome. This Acrosome contains a liquid which facilitates the entry of the sperm into an egg . The middle piece contains numerous mitochondria which are involved in producing energy needed for propelling the sperm after ejaculation. The tail is for movement .
    1 aii )
    A palisade cell contain chloroplasts which makes them a site of photosynthesis in the leaves of those that plants that contain them , converting the light to the chemical energy . Beneath the palisade mesophyll are the spongy mesophyll cells , which also perform photosynthesis . They allow the passage of gases through the intercellular spaces in them .
    1 b )
    Draw the Diagram
    1 c )
    In a tabular form :
    Under mammals:
    i ) Mammals give birth to their young ones alive
    ii) Mammals product amniotic eggs .
    Under amphibians:
    i ) Amphibians lay eggs
    ii) Amphibians do not produce amniotic eggs .
    1 d )
    i ) Use of condoms/ pills .
    ii) Withdrawal method
    ==========================

    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

    2 d )
    Fill The Table
    Tabulate
    i ) Halozoic - Human ,venus fly trap
    ii) parasitic - tape worm ,Venus fly trap
    iii ) symbiotic - lichen
    iv ) sapraphytic- Rhizopus ,mushroom ,housefly
    v ) autotrophic - spirogyra ,water leaf plant ,elephant grass
    ----------------------------------------------------------------
    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.
    v)Check over Forest Clearance for Agricultural and Habitation Purposes.
    iv)Proper Utilisation of Forest and Forests Products.
    3 d )
    i ) increases soil nutrients
    ii) increases soil air
    iii ) improve soil structure
    iv ) does not corrupt the soil
    3 e )
    i ) AA
    ii) AO
    iii ) BB
    iv ) BO
    ------------------------------------------------
    4a)
     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.
    ------------------------------------------------
    6 ai)
    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
    6 aii )
    i ) Bacteria
    ii) methanogenic archaea

    6 b )
    Nitrogen — 78 percent .
    Oxygen — 21 percent .
    Argon — 0 . 93 percent .
    Carbon D

    6 c )
    i ) They are composed of relatively few species of plants
    ii) The salt level of the habitat is high
    iii ) High flooding rate
    iv ) extreme temperature and salinity fluctuations.

    6 cii )
    Roots of salt marsh plants help stabilize the sandy substrate and trap and hold nutrients and detritus that flow through with each tidal cycle. This detritus trap helps feed bacteria , algae , and invertebrates . These root tangles also provide critical refuge for small fish and other animals .

    6 d )
    i ) Pulmonary Tuberculosis
    ii) Cholera
    iii ) Pertussis
    iv ) Salmonellosis

    6 dii )
    i ) food poisoning
    ii) food spoilage
    iii ) Low market value of food

    6 e )
    the person need plenty of rest and diet rich in protein , fruits an vegetables and take plenty water

    6 f )
    Tabulate
    Tillage
    i ) the soil is prepared mammally or mechanically
    ii) conserves soil nutrients
    iii ) good for farm practise
    Bush Burning
    i ) fire is used to remove plants
    ii) destroyes soil nutrients
    iii ) a bad farm practise
    *Complete
    ==

    Offline Yonnie

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    Offline dolapo2#

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    Thanks bro u helped a lot

     

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