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WAEC 2017 Biology Obj And Essay/Theory Answer – May/June Expo

Real and Correct WAEC biology Essay/Theory and OBJ Questions and Answer Solution – May/June 2017 Verified Expo Runs

Biology Obj:
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11CDBDCBBABA
21CBCCDBCDDC
31CBAADCCABA
41CABADDDBDC

Biology Theory

1ai)
Classification of living things is the way in which all living things are placed into larger and larger groups or catetories that share similarities and a common ancestry.
1aii)
Carl Linnaeus
1aiii)
i)It allows scientists to identify, group, and properly name organisms via a standardized system
ii)to make it easier to study and understand their behaviors,
iii)To study evolutionary progression of millions of life forms
1aiv)
i)Kingdoms
ii)Phylum
iii)Classes
iv)Order
v)Families
vi)Genus
vii)Species
1bi)
i)they can reproduce
ii)they can mutate
1bii)
i)they do not carry out metabolism on their own hence they do not grow
ii)they contain no cytoplasm or cellular organelles
1ci)
i)mosaic disease of cassava
ii)swollen shoot disease of cocoa
1cii)
i)human immunodeficiency virus (HIV)
ii)measles
==========================
2a)
i)They catalyse reactions by lowering the activation energy of a reaction
ii)They are regenerated after each reaction
iii)They are substrate specific, hence only molecules which are complementary to their shape can bind to it.
iv)They aid in metabolism(anabolism and catabolism)
2bi)
-Pancreatic lipase
-Amylase
2bii)
i)maltae act
ii)lipase act
2bii)
i)it converts fat and oil to fatty acids and glycerol
ii)it converts starch to maltose
2ci)
Chlorophyll is necessary to absorb the radiant energy of the sun to synthesize sugar during photosynthesis
2cii)
i)Magnessium
ii)Iron
2ciii)
i)Magnessium —}Yellowing of leaves and poor growth
ii)Iron—}Yellowing of leaves and poor growth
2d)
i)Take a freshly plucked green leaf and boil it for about 5minutes to kill the cells of the leaf and to burst the starch grains in the cells of the leaf
ii)Boil the boiled leaf in ethanol to remove the chlorophyll(i.e.decolourizes)
iii)Dip the decolourized leaf in warm water to soften it
iv)Wash the leaf in tap water to remove traces of ethanol in it
v)Pour iodine solution on it and allow to stand for some minutes
vi)If the leaf turns blue-black,it contains starch
=========================
6a)
The odorous molecules come into contact with the olfactory epithelium at the top of the nasal cavity and stimulate multiple chemically cell receptors and thus the odour is transmitted to the brain. There after the brain interprets the type of smell.
6b)
i)Shell
ii)Membranes
iii)Airspace
iv)Albumen
v)Yolk
vi)Chalaza
6ci)
autotrophs are organisms that can synthesizes food from inorganic substances by using chemical energy or light
6cii)
i)Bacteria
ii)Unicellular algae
6d)
i)providing leadership on matters critical to health
ii)shaping the research agenda and stimulating the generation
iii)translation and dissemination of valuable knowledge
iv)setting norms and standards
v)promoting and monitoring their implementation
6e)
i)plants: Water Wisteria and Java Moss.
ii)Animals: catfish and earthworm
6f)
In tabular form
-Mammalian skin-
i)It has melanin
ii)It has sweat pores
iii)Does not show photosynthesis
iv)It composes of animal cells
v)It is touch receptive
-Plant epidermis-
i)It has chlorophyll
ii)It has stomata
iii)It shows photosynthesis
iv)It is composed of plant cells
v)It is not touch receptive
6gi)
i)Intra specific competition
6gii)
i)Inter specific competition
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3 Comments on WAEC 2017 Biology Obj And Essay/Theory Answer – May/June Expo

  1. we need biology earlier

  2. 08168040102 // April 19, 2017 at 12:38 pm // Reply

    bio-obj
    1ABDBCDCBBD
    11CDBDCBBABA
    21CBCCDBCDDC
    31CBAADCCABA
    41CABADDDBDC
    Section B Answer 3 Only
    ================================
    2a)
    i)They catalyse reactions by lowering the activation energy of a reaction
    ii)They are regenerated after each reaction
    iii)They are substrate specific, hence only molecules which are complementary to their shape can bind to it.
    iv)They aid in metabolism(anabolism and catabolism)
    2bi)
    -Pancreatic lipase
    -Amylase
    2bii)
    i)maltae act
    ii)lipase act
    2bii)
    i)it converts fat and oil to fatty acids and glycerol
    ii)it converts starch to maltose
    2ci)
    Chlorophyll is necessary to absorb the radiant energy of the sun to synthesize sugar during photosynthesis
    2cii)
    i)Magnessium
    ii)Iron
    2ciii)
    i)Magnessium —}Yellowing of leaves and poor growth
    ii)Iron—}Yellowing of leaves and poor growth

    1ai)
    Classification of living things is the way in which all living things are placed into larger and larger groups or catetories that share similarities and a common ancestry.
    1aii)
    Carl Linnaeus
    1aiii)
    i)It allows scientists to identify, group, and properly name organisms via a standardized system
    ii)to make it easier to study and understand their behaviors,
    iii)To study evolutionary progression of millions of life forms
    1aiv)
    i)Kingdoms
    ii)Phylum
    iii)Classes
    iv)Order
    v)Families
    vi)Genus
    vii)Species
    1bi)
    i)they can reproduce
    ii)they can mutate
    1bii)
    i)they do not carry out metabolism on their own hence they do not grow
    ii)they contain no cytoplasm or cellular organelles
    1ci)
    i)mosaic disease of cassava
    ii)swollen shoot disease of cocoa
    1cii)
    i)human immunodeficiency virus (HIV)
    ii)measles

    6a)
    The odorous molecules come into contact with the olfactory epithelium at the top of the nasal cavity and stimulate multiple chemically cell receptors and thus the odour is transmitted to the brain. There after the brain interprets the type of smell.
    6b)
    i)Shell
    ii)Membranes
    iii)Airspace
    iv)Albumen
    v)Yolk
    vi)Chalaza
    6ci)
    autotrophs are organisms that can synthesizes food from inorganic substances by using chemical energy or light
    6cii)
    i)Bacteria
    ii)Unicellular algae
    6d)
    i)providing leadership on matters critical to health
    ii)shaping the research agenda and stimulating the generation
    iii)translation and dissemination of valuable knowledge
    iv)setting norms and standards
    v)promoting and monitoring their implementation
    6e)
    i)plants: Water Wisteria and Java Moss.
    ii)Animals: catfish and earthworm
    6f)
    In tabular form
    -Mammalian skin-
    i)It has melanin
    ii)It has sweat pores
    iii)Does not show photosynthesis
    iv)It composes of animal cells
    v)It is touch receptive
    -Plant epidermis-
    i)It has chlorophyll
    ii)It has stomata
    iii)It shows photosynthesis
    iv)It is composed of plant cells
    v)It is not touch receptive
    6gi)
    i)Intra specific competition
    6gii)
    i)Inter specific competition

  3. Please i need the questions too, so i can revise with, even after the exams

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