K.C.S.E Biology Q & A - MODEL 2007PP1QN24
State a characteristics that is common to all cervical vertebrae
ANSWER
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K.C.S.E Biology Q & A - MODEL 2007PP1QN23
What is thigmotropism?
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN23
Name the hormone that is responsible for apical dominance
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN22
The diagram below represents a neurone
(i) Name the neurone
(ii) Name the parts labeled P and Q P……………………………………………………………………….. Q………………………………………………………………………. (c) State a function of myelin sheath
ANSWERS
(b) Motor neutron
(ii) P- Dendrites Q- Axoplasm (Axon) (d) Insulates the axon
K.C.S.E Biology Q & A - MODEL 2007PP1QN22
Where in the human body are relay neurons found
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN21
Give a reason why organisms become resistant to drugs
ANSWER
K.C.S.E Biology Q & A - MODEL 2007PP1QN21
What is adaptive radiation
ANSWER
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
K.C.S.E Biology Q & A - MODEL 2007PP1QN13
Name the products of anaerobic respiration in
(i) Plants (ii) Animals
ANSWERS
(i) Ethanol and carbon (iv) oxide
(ii) Lactic acid
K.C.S.E Biology Q & A - MODEL 2007PP1QN12
Name two structures for gaseous exchange in aquatic plants
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN11
State tow ways in which the blood cells are adapted to their function
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN11
What prevents blood in veins from flowing backwards?
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN10
The diagram below represents a plant tissue
(a) Name the tissue
(b) Name the cells labeled K and L. K………………………………………………………………………. L………………………………………………………………………. (c) What is the function of the companion cell?
ANSWERS
(a) Phloem tissues
(b) K- companion cell L – sieve tube (c) Supply nutrients and energy to the sieve tubes |
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