K.C.S.E Biology Q & A - MODEL 2006PP1QN23
State the function of each of the following parts of human ear.
a) Ear ossicles b) Cochlea c) Semi circular canals d) Eustachian tube. 
answers
K.C.S.E Biology Q & A - MODEL 2006PP1QN22
State two functional differences between the rods and cones in the human eye.
answers
Rodes Cones
K.C.S.E Biology Q & A - MODEL 2006PP1QN22
State the function of ciliary muscles in the human eye.
answer
K.C.S.E Biology Q & A - MODEL 2006PP1QN21
The diagram below represents a reflex are in human.
​a) Name the parts labeled X and Y
b) Name the substance that is responsible for the transmission of an impulse across the synapse.
answers
​(a) X- motor neurone- accept of motor neurone rej. Axon alone
Y- Sense organ/ receptor (b) Acetyl; chlorine/ noradrenaline ( Nerepinephrine)
K.C.S.E Biology Q & A - MODEL 2006PP1QN20
State three biological importance of tropisms plants.
answers
K.C.S.E Biology Q & A - MODEL 2006PP1QN20
What name is given to response to contact with surface exhibited by tendrils and climbing stems in plants?
answer
K.C.S.E Biology Q & A - MODEL 2006PP1QN19
Give three advantages of cross pollination.
answers
K.C.S.E Biology Q & A - MODEL 2006PP1QN19
a) Explain how the following prevent self pollination.
(i) Protoadry (ii) Self – sterility.
answers
(i) Protoandry – Male reproduction organ/ anthers androecia/ stamens mature earlier than female reproduction organ/ carpels/ stigma/ pistil/ gynoecium.
(ii) Self sterility- pollen grains are sterile to stigma of some plants/ flowers
K.C.S.E Biology Q & A - MODEL 2006PP1QN18
How does substrate concentration affect the rate of enzyme action?
answer
K.C.S.E Biology Q & A - MODEL 2006PP1QN18
State two functions of bile juice in the digestion of food.
answers
K.C.S.E Biology Q & A - MODEL 2006PP1QN17
A certain animal has no incisors, no canines, 6 premolars and 6 Molars in its upper jaw. In the lower jaw there are 6 incisors, 2 canines, 6 Premolars and six molars. Write its dental formula.
answer
K.C.S.E Biology Q & A - MODEL 2006PP1QN17
What is the function of carnassials teeth?
answer
K.C.S.E Biology Q & A - MODEL 2006PP1QN17
Distinguish between the terms homodont and heterodont.
answers
​Homodont – having same kind/ type/ similar teeth.while Heterodont – having different type kind of teeth
K.C.S.E Biology Q & A - MODEL 2006PP1QN16
What is the importance of the following in an ecosystem?
a) Decomposers b) Predation
answers
(a) Decomposer – recycling of nutrients
(b) Predation – regulation of numbers/ population
K.C.S.E Biology Q & A - MODEL 2006PP1QN15
Explain continental drift as an evidence of evolution.
answers
​Current continents existed as one large land mass/ Pingea/ Laureshia Guondaland; the present continent drifted leading to isolation of organisms; organism in each continent evolved along different lines hence emergence of new species,
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