K.C.S.E Biology Q & A - MODEL 2012PP1QN25
State the role of the following hormones in the life cycle of insects:
ecdysone hormone; . juvenile hormone. 
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN24
State four characteristics of apical meristem cells.
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN23
Name the strengthening materials found in the following support tissues:
(a) collenchyrna; (b)Xylem
answers
​(a) Cellulose;
(b) Lignin;
K.C.S.E Biology Q & A - MODEL 2012PP1QN22
State the importance of divergent evolution to organisms.
answer
K.C.S.E Biology Q & A - MODEL 2012PP1QN21
Name the process through which free atmospheric nitrogen is converted into nitrates.
answer
K.C.S.E Biology Q & A - MODEL 2012PP1QN20
State three aspects that can be used to estimate growth in seedlings
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN19
List four symptoms of diabetes mellitus.
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN18
Why are plants able to accumulate most of their waste products for long?
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN17
Name two substances that leave the foetal blood through the placenta.
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN16
The diagram below represents an experimental set-up used by students to investigate a certain process.
​Flower Q produced seeds while P did not. Account for the results.
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN15
What name is given to a group of hormones that controls the development of secondary sexual characteristics in a human male?
answer
K.C.S.E Biology Q & A - MODEL 2012PP1QN14
Name the type of respiration that is most efficient.
b) Give a reason for your answer in (a) above
answer
a)Aerobic respiration;
b)It releases more energy per unit mass;
K.C.S.E Biology Q & A - MODEL 2012PP1QN13
State three factors that affect the rate of diffusion.
answers
Temperature; surface area; distance that particles have to travel; diffusion/concentration gradient; size/density of particles; surface area to volume ratio; thickness of membrane; medium of diffusion
K.C.S.E Biology Q & A - MODEL 2012PP1QN12
Why is it recommended to keep the stage of the microscope dry?
answers
Name the part of a light microscope used to bring an image of a specimen into sharp focus.26/6/2020
K.C.S.E Biology Q & A - MODEL 2012PP1QN12
Name the part of a light microscope used to bring an image of a specimen into sharp focus.
answer
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