Mastering KCSE Biology with Comprehensive Topical Questions and Answers
K.C.S.E Biology Q & A - MODEL 2009PP1QN05
State two causes of chromosomal mutations
ANSWERS
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K.C.S.E Biology Q & A - MODEL 2009PP1QN05
What is meant by the following terms
(i) Hybrid vigour (ii) Polyploidy?
ANSWERS
(i) production of plants and animals that have superior/ greater productivity/ have beneficial/ characteristics than either of their parents.
(ii) Condition in which an individual has more than two sets of chromosomes K.C.S.E Biology Q & A - MODEL 2009PP1QN04
​The diagram below represents a stage during germination of a seed
​(i) Name the type of germination illustrated in the diagram
(ii) State the role of the part labeled x during germination of the seed
ANSWERS
(i) Epigeal
(ii) Protection of the delicate plumule; pulls the cotyledons above the ground
K.C.S.E Biology Q & A - MODEL 2009PP1QN04
The state during which a seed cannot germinate even when conditions for Germination are suitable is called
ANSWER
K.C.S.E Biology Q & A - MODEL 2009PP1QN03
State the functions of the following parts of a light microscope
(a) Objective lens (b) Diaphragm
ANSWERS
K.C.S.E Biology Q & A - MODEL 2009PP1QN02
Name two befits that a parasite derives from the host
ANSWERS
K.C.S.E Biology Q & A - MODEL 2009PP1QN01
State two characteristics of fungi
ANSWERS
K.C.S.E Biology Q & A - MODEL 2009PP1QN01
Name the external feature which is common in birds, fish and reptiles
answer
K.C.S.E Biology Q & A - MODEL 2008PP1QN29
State a function of amniotic fluid.
answer
K.C.S.E Biology Q & A - MODEL 2008PP1QN28
Distinguish between protandry and protogyny.
answers
K.C.S.E Biology Q & A - MODEL 2008PP1QN28
State the mode of asexual reproduction in yeast.
answer
K.C.S.E Biology Q & A - MODEL 2008PP1QN27
Explain how anaerobic respiration is applied in sewage treatment.
answers
K.C.S.E Biology Q & A - MODEL 2008PP1QN26
State one use of each of the following excretory products of plants:
(a) colchicine; (b)pawpaw
answers
(a) Inducing polyploidy/ treatment
(b) Meat tenderizer K.C.S.E Biology Q & A - MODEL 2008PP1QN30
The diagram below shows two fused bones of a mammal
(a) Identify the fused bone
(b) Name the (i) Bone that articulates at the point labelled F (ii) The hole labelled G
ANSWERS
(a)Pelvic girdle
(b) (i) Femur (ii) Obturatar foramen. K.C.S.E Biology Q & A - MODEL 2008PP1QN25
Giving a reason in each case, name the class to w which each of the following organisms
Bean plant Reason Bat Reason
ANSWERS
Bean plant - Dicotyledonae
Reason Leaves have net veined; two cotyledon; tap root system; xylem with phloem in between the arms Bat Flying mammal Reason Have sweat glands; 3 ear ossicle; presence of fur; mammaring glands K.C.S.E Biology Q & A - MODEL 2008PP1QN24
Name the sites where light and dark reactions of photosynthesis take place
Light reaction Dark reaction
ANSWERS
K.C.S.E Biology Q & A - MODEL 2008PP1QN23
The diagram below shows a human tooth
(a) Identify the tooth
(b) How is the tooth adapted to its function (c) State the role of the following vitamins in the human body (i) C (ii) K
ANSWERS
(a) Canine
(b) Pointed/ sharp for piercing/ tearing/ cutting food (c) (i) C- Absorption of lien/ prevent scurvy/ quick healing of wounds/ best immunity/ ant oxidants/ prevents anaemia/ formation of connective tissues/ ​ K – blood clothing
K.C.S.E Biology Q & A - MODEL 2008PP1QN21
What is seed dormancy
ANSWER
​K.C.S.E Biology Q & A - MODEL 2008PP1QN20
Name the opening to the chamber of the heart of an insect
ANSWER
K.C.S.E Biology Q & A - MODEL 2008PP1QN20
Name an organism which has single circulatory system
ANSWERS
K.C.S.E Biology Q & A - MODEL 2008PP1QN20
what is a single circulatory system
ANSWERS
K.C.S.E Biology Q & A - MODEL 2008PP1QN19
The diagram below represents a tissue obtained from an animal
(a) Identify the tissue
(b) State the functions of the tissue named ( a) above
ANSWERS
(a) Cardiac muscle
(b) Contraction of the heart
K.C.S.E Biology Q & A - MODEL 2008PP1QN18
How is the epidermis of a leaf of a green plant adapted to its function
ANSWERS
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