KNEC KCSE BIOLOGY TOPICAL QUESTIONS AND ANSWERS

State two guidelines that should be followed when typing scientific names.

29/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2015PP1QN01

State two guidelines that should be followed when typing scientific names.

answers

The Genus name starts with a capital letter while the species name starts with a small letter;
The two names are typed in italics/two names underlined separately;

Comments

K.C.S.E Biology Q & A - MODEL 2013PP2QN01

28/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP2QN01

The diagram below represents a plant in the division Bryophyta.

(i) Name the parts labelled B and D.
B
D
(ii) State one function for each of the parts labelled A and C.
A
C
(b) The diagram below represents a member of the kingdom Animalia.

(i) Name the phylum to which the organism belongs.
(ii) Using observable features in the diagram, give three reasons for the answer in b(i).

answers

(a) (i) B Seta/stalk;
D Rhizoid:
(ii) A Production of spores/sporulation;
C Photosynthesis;
(b) (i) Arthropoda;
(ii) Segmented body;
Jointed appendages;
Presence of exoskeleton

Comments

K.C.S.E Biology Q & A - MODEL 2013PP1QN12

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP1QN12

(a) A student collected an organism and observed the following features: simple eyes,four pairs of legs and two body parts.
(i) State the class to which the organism belongs.
(ii) Give an example of an organism in this class.
(b) Name the kingdom to which plasmodium belongs.

answers

(a) (i) Arachnida;
(ii) Spider/scorpion/tick/mite;
(b) Protoctista/protista;

Comments

Construct a step in a dichotomous key using two leaves one with a serrated and the other with a smooth margin.

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP1QN08

Construct a step in a dichotomous key using two leaves one with a serrated and the other with a smooth margin.

answers

1(a) - Leaf with serrated margin -- go to 2;
(b) - Leaf with smooth margin -- go to --;

Comments

Name the taxonomic unit that comes immediately after a phylum in classification.

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP1QN03

Name the taxonomic unit that comes immediately after a phylum in classification.

answers

Class;

Comments

State two external features found in the class Mammalia only.

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP1QN03

State two external features found in the class Mammalia only.

answers

Have mammary glands; have external ears/pinna;
Body covered with fur/hair;

Comments

K.C.S.E Biology Q & A - MODEL 2012PP1QN02

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2012PP1QN02

The diagram below represents a certain organism collected by a student at the sea shore.

(a) Name the class to which the organism belongs.
(b) Give three reasons for your answer in (a) above.

answers

Comments

K.C.S.E Biology Q & A - MODEL 2011PP1QN12

25/6/2020

Comments

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; .

Comments

K.C.S.E Biology Q & A - MODEL 2011PP1QN09

25/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2011PP1QN09

The diagrams below illustrate the organs of some flowering plants.

State the classes of plants to which each belong.
A
B

answers

(a) Dicotyledonae;
(b) Monocotyledonae;

Comments

State three characteristics of the class crustacea.

25/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2011PP1QN08

State three characteristics of the class crustacea.

answers

Fused head and thorax/cephalothorax often protected by a carapace;
Gaseous exchange through gills;
Two pairs of antennae;
Five to twenty pairs of limbs;
A pair of compound eyes;
Three pairs of mouth parts (consisting of mandibles, maxillary, palp and labium) a pair of
mandibles and 2 pairs of maxillae.

Comments

Give three reasons for classifying organisms.

25/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2011PP1QN03

Give three reasons for classifying organisms.

answers

(i) Identify similarities and differences between organisms;
(ii) Organize scientific knowledge in an orderly system;
(iii) Monitor emergence, presence and disappearance of organisms in and from the earth;
(iv) Grouping organisms for easy stud

Comments

K.C.S.E Biology Q & A - MODEL 2010PP1QN29

24/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2010PP1QN29

The diagram below represents a female cone.

(a) Name the subdivision of the plant from which the cone was obtained.
(b) Other than the presence of cones, name two other external features that identify plants in the subdivision named in (a) above.

answer

(a) Gymnospermae;
(b) Needle-like leaves (with waxy cuticle);
Naked seeds;

Comments

K.C.S.E Biology Q & A - MODEL 2010PP1QN12

24/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2010PP1QN12

The diagram below illustrates the structure of bread mould.

(a) Name the part labelled J.
J
K
(b) State the functions of the structure labelled K.

answers

(a) J – sporangium
K-Rhizoids
(b)- Absorption of soluble substances/ digested food
- Secretion of digestive enzymes;
- Anchorage(of mould on substrate);

Comments

State three external differences between chilopoda and diplopoda.

24/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2010PP1QN08

State three external differences between chilopoda and diplopoda.

answers

Comments

State two characteristics of fungi

23/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2009PP1QN01

State two characteristics of fungi

ANSWERS

Most have cell wall made up of cultic (or cellulose)
Most reproduce by means of spores/ sporulation
They are eukanyotee/eukaryotic
They are heterotrophy/ lack chloroplasts / some are saprophytic while others are Parasitic
Have network of myphae/ mycelia
Store food inform of glycogen or oil droplets

Comments

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State two guidelines that should be followed when typing scientific names.

State two guidelines that should be followed when typing scientific names.

K.C.S.E Biology Q & A - MODEL 2013PP2QN01

K.C.S.E Biology Q & A - MODEL 2013PP2QN01

K.C.S.E Biology Q & A - MODEL 2013PP1QN12

K.C.S.E Biology Q & A - MODEL 2013PP1QN12

Construct a step in a dichotomous key using two leaves one with a serrated and the other with a smooth margin.

Construct a step in a dichotomous key using two leaves one with a serrated and the other with a smooth margin.

Name the taxonomic unit that comes immediately after a phylum in classification.

Name the taxonomic unit that comes immediately after a phylum in classification.

State two external features found in the class Mammalia only.

State two external features found in the class Mammalia only.

K.C.S.E Biology Q & A - MODEL 2012PP1QN02

K.C.S.E Biology Q & A - MODEL 2012PP1QN02

K.C.S.E Biology Q & A - MODEL 2011PP1QN12

K.C.S.E Biology Q & A - MODEL 2011PP1QN12

K.C.S.E Biology Q & A - MODEL 2011PP1QN09

K.C.S.E Biology Q & A - MODEL 2011PP1QN09

State three characteristics of the class crustacea.

State three characteristics of the class crustacea.

Give three reasons for classifying organisms.

Give three reasons for classifying organisms.

K.C.S.E Biology Q & A - MODEL 2010PP1QN29

K.C.S.E Biology Q & A - MODEL 2010PP1QN29

K.C.S.E Biology Q & A - MODEL 2010PP1QN12

K.C.S.E Biology Q & A - MODEL 2010PP1QN12

State three external differences between chilopoda and diplopoda.

State three external differences between chilopoda and diplopoda.

State two characteristics of fungi

State two characteristics of fungi

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