Mastering KCSE Biology with Comprehensive Topical Questions and Answers
K.C.S.E Biology Q & A - MODEL 2007PP2QN04
State two advantages of having an exoskeleton
answers
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K.C.S.E Biology Q & A - MODEL 2007PP2QN04.
State the functions of synovial fluid
answers
K.C.S.E Biology Q & A - MODEL 2007PP2QN04
State the difference between ball and socket and hinge joint
answers
Name the three type of muscles found in mammals and give an example of where each of them is found21/6/2020
K.C.S.E Biology Q & A - MODEL 2007PP2QN04
Name the three type of muscles found in mammals and give an example of where each of them is foundK.C.S.E Biology Q & A - MODEL 2007PP2QN03
The diagram below shows a stage during fertilization in a plant.
(i) Name the parts labeled Q, R, and S
R S (ii) State two functions of the pollen tube (c) On the diagram label the micropyle K.C.S.E Biology Q & A - MODEL 2007PP2QN03
What is meant by the following terms
(i) Protandry (ii) Self sterility?
answers
(i) Protandry – stamens mature and pollen grains are shed off before the stigma matures
(ii) Self sterility – Pollen grains from the anthers cannot grow on the stigma of the same flower or plant
K.C.S.E Biology Q & A - MODEL 2007PP2QN02
What term is given to the condition described in (c) (i) above
answer
K.C.S.E Biology Q & A - MODEL 2007PP2QN02
What would happen if a person produced less antidiuretic hormone?
answer
K.C.S.E Biology Q & A - MODEL 2007PP2QN02
Which portion of the human nephron are only found in the cortex?
answers
K.C.S.E Biology Q & A - MODEL 2007PP2QN02.
Explain what happens to excess amino- acids in the liver of humans
answers
K.C.S.E Biology Q & A - MODEL 2007PP2QN01
Give the scientific name of the organism that causes tuberculosis in humans
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP2QN01
The diagram below represents some gaseous exchange structures in humans
​(a) Name the structures labeled K, L, and M
K……………………………………………………………………………. L……………………………………………………………………………. M…………………………………………………………………………… (b) How is the structure labeled J suited to its function? (c) Name the process by which inhaled air moves from the structure labeled L into blood capillaries
ANSWERS
​( a) K- Pleural membranes
L- Alveolus M- Intercostal muscles (b) Has c- shaped cartilage rings that support it preventing it from collapsing and allow free flow of air Inner lining has secreting cells that trap fine dust particles and micro- organisms Inner lining has hair like structures called cilia that enhance upward movement of the mucus to the larynx (c) Diffusion
K.C.S.E Biology Q & A - MODEL 2007PP1QN20
What is a test- cross?
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN20
Explain how the following occur during gene mutation:
(i) Deletion (ii) Inversion
ANSWERS
(i) Occurs when some nucleotides of a part of a gene break off and disappear
(ii) Occurs when the nucleotides of a part of gene become inverted by taking a 1800 turn.
K.C.S.E Biology Q & A - MODEL 2007PP1QN20
What is meant by the term allele?
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN19
Name the part of a bean that elongates to bring about epigeal germination
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN19
State two environmental conditions that can cause seed dormancy
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN18
State two disadvantages of sexual reproduction in animals
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN17
The diagram below represents a stage during cell division
(a) (i) Identify the stage of cell division
(ii) Give three reasons for your answer in (a) (i) above (b) Name the structures labeled M
ANSWERS
(a) (i) Anaphase 1
(i) Homologous chromosomes separates at the equator (ii) Chromosomes start migrating to opposite poles (iii) Sister chromatids attached at the centromere (b) Spindle fibres
K.C.S.E Biology Q & A - MODEL 2007PP1QN16
State two ways in which schritosoma species is adapted to parasitic mode of life
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN15
Name a method that could be used to estimate the population size of the following organisms
(i) Fish in a pond (ii) Black jack in a garden
ANSWERS
​(i) Capture and recapture method
(ii) Line transect
K.C.S.E Biology Q & A - MODEL 2007PP1QN15
Distinguish between population and community
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN14
Name the hormones involved in regulating glucose level in blood
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN14
What is the meaning of the terms
(i) Homeostatic (ii) Osmoregulation?
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN13
What is oxygen debt?
ANSWER
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