Mastering KCSE Biology with Comprehensive Topical Questions and Answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN28
State two ways by which auxins regulate growth in seedlings.
ANSWERS
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K.C.S.E Biology Q & A - MODEL 2011PP1QN28
What is a tropic response?
ANSWERS
K.C.S.E Biology Q & A - MODEL 2011PP1QN27
The diagram below represents features of a joint in a mammal.
​(a)Name the part labelled A.
(b) State the function of the part labelled B.
ANSWERS
​(a) Ligament;
(b) Secretes synovial fluid; contains/holds the synovial fluid in place;
K.C.S.E Biology Q & A - MODEL 2011PP1QN26
Name the gamete cells that are produced by the ovaries.
ANSWERS
K.C.S.E Biology Q & A - MODEL 2011PP1QN25
State one economic importance of each of the following plant excretory products.
(a) Tannin. (b) Quinine. (c) Caffeine.
ANSWERS
K.C.S.E Biology Q & A - MODEL 2011PP1QN24
What would be the expected results from a test cross?
ANSWERS
K.C.S.E Biology Q & A - MODEL 2011PP1QN24
Differentiate between the following terms:
(i)dominant gene and recessive gene: (ii) continuous variation and discontinuous variation.
ANSWERS
​(i) Dominant gene expresses itself phenotypically in both its homozygous and heterozygous states while recessive gene can only express itself phenotypically in the homozygous state;
(ii) Continuous variation is a characteristic for which there is a continuum or range while discontinuous variation is a characteristic for which there are discrete categories or units; K.C.S.E Biology Q & A - MODEL 2011PP1QN23
The diagram below represents a transverse section of an ovary from a certain flower.
a) (i)Name the structure labelled W.
(ii)Name the type of placentation illustrated in this diagram. (b) Give an example of a plant whose flowers have the type of placentation named in (a)(ìi) above.
ANSWERS
(a) (i) Ovule;
(ii) Axile placentation; (b) Orange or any correctly named citrus plant;
K.C.S.E Biology Q & A - MODEL 2011PP1QN22
State the difference in content of oxygen and carbon (IV) oxide in the air that enters and leaves the human lungs.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN21
State two limitations of fossils as an evidence of evolution.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN21
What is meant by convergent evolution?
answer
K.C.S.E Biology Q & A - MODEL 2011PP1QN20
The number of stomata on the lower and upper surfaces of two leaves from plant species X and Y were counted under the field of view of a light microscope. The results were as shown in the table below.
​(a) Which of the two leaves would be expected to have a lower rate of transpiration?
(b) Give a reason for your answer in (a) above.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN19
Write an equation that sum manses the process of aerobic respiration.
answers
​Glucose + Oxygen (enzyme)=Carbon IV oxide + water + energy;
C6 H12 06+602 (enzyme)= 6C02+6H20 + ATP
K.C.S.E Biology Q & A - MODEL 2011PP1QN19
Apart from the lungs, name two gaseous exchange surfaces in a frog.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN18
State two functions of saliva.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN18
Name one salivary gland in humans,
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN17
The diagram below represents part of the human digestive system.
(a) Name the organs labelled L and M.
L M . (b) (i) Name the substance produced by the organ labelled K. (ii) State the function of the substance named in b(i) above.
answers
​.(a) L - Duodenum;
M - Pancreas; (b) (i) Bile; (ii) Emulsification/emulsifies fats; (iii) Provides alkalinic medium for enzyme action. (iv) Neutralizes acidic chyme.
K.C.S.E Biology Q & A - MODEL 2011PP1QN16
What is the role of blood platelets in the blood clotting process?
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN16
Describe the condition known as varicose veins.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN15
Give reasons for carrying out the following procedures when preparing temporary wet mounts of plant tissues.
(a) Making thin plant sections. (b) Adding water on the plant section. (c) Placing a cover slip over the plant section.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN13
State two functions of carbohydrates in the human body.
answers
K.C.S.E Biology Q & A - MODEL 2011PP1QN12
The diagram below represents a certain organism.
​State the phylum and class to which it belongs.
Phylum Class
answers
​Chordata; . Aves; .
K.C.S.E Biology Q & A - MODEL 2011PP1QN11
State the functions of the following parts of a light microscope.
(a)Fine adjustment knob. Stage.
answers
(a)Moves the body tube through smaller distances to bring the image/specimen/object into sharper focus;
(b)Platform where specimen (on slide) is placed;
K.C.S.E Biology Q & A - MODEL 2011PP1QN10
Name the site of anaerobic respiration in a cell.
answer
K.C.S.E Biology Q & A - MODEL 2011PP1QN10
Give two differences in the products of anaerobic respiration between plants and animals.
answers
(i) Lactic acid in animals while in plants it is ethanol/alcohol;
(ii) No carbon IV oxide produced in anaerobic respiration in animals while anaerobic respiration in plants produces carbon IV oxide; |
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