KNEC KCSE BIOLOGY TOPICAL QUESTIONS AND ANSWERS

(a) Enable living organisms to avoid dangerous/harmful/hash climatic environmental conditions; Enable living organisms obtain/access favourable environmental conditions (light, water, oxygen,

Comments

Give one reason why the coarse adjustment knob should not be used to lower the high power objective.

30/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2017PP1QN09

Give one reason why the coarse adjustment knob should not be used to lower the high power objective.

answers

Can break the objective lens/cover slip/slide;
Can destroy the specimen (making the microscope dirty);

Comments

State the function of a mirror in a light microscope.

30/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2017PP1QN09

State the function of a mirror in a light microscope.

answers

Reflects light (through the condenser) to the object;

Comments

K.C.S.E Biology Q & A - MODEL 2017PP1QN01

30/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2017PP1QN01

Below is an illustration of a piece of apparatus strategically positioned to trap some organisms.

(a) Name the apparatus.
(b) State the function of the part labelled E.

answers

a) Pooter/Aspirator;
b) To prevent dirt/insects from entering the suction tube/into the mouth;

Comments

K.C.S.E Biology Q & A - MODEL 2016PP1QN26

30/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2016PP1QN26

State the functions of the following parts of a microscope.
(a) Objective Lens
(b) Diaphragm

answers

Comments

K.C.S.E Biology Q & A - MODEL 2016PP1QN017

30/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2016PP1QN017

State the name given to the study of:
(i) The cell
(ii) Micro-organisms

answers

(i) The cell
Cytology:
(ii) Micro-organisms

Microbiology

Comments

What is meant by the term binomial nomenclature?

28/6/2020

Comments

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

What is meant by the term binomial nomenclature?

answer

The scientific system of giving two names (Genus and species) to living organisms;

Comments

A student drew a 6cm long diagram of a plant flower. If the actual length of the flower was 12cm, calculate the magnification of the drawing made by the student. Show your working.

28/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2014PP1QN07

A student drew a 6cm long diagram of a plant flower. If the actual length of the flower was 12cm, calculate the magnification of the drawing made by the student. Show your working.

ANSWERS

Comments

K.C.S.E Biology Q & A - MODEL 2014PP1QN01

28/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2014PP1QN01

State the importance of each of the following in living organisms:
(a) nutrition
(b) excretion

ANSWERS

(a) Acquisition and utilization of nutrients;
(b) Elimination of metabolic wastes to prevent accumulation to toxic level;

Comments

State two characteristics of living organisms that are specific to plants.

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP1QN13

State two characteristics of living organisms that are specific to plants.

answers

Autotrophic nutrition; show alternation of generation;
Limited movement;
Limited excretory products/unspecialized respiratory structures;
Localised growth;

Comments

Using a microscope, a student counted 55 cells a cross a field of view whose diameter was 6000pm. Calculate the average length of the cells. Show your working.

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP1QN06

Using a microscope, a student counted 55 cells a cross a field of view whose diameter was 6000pm. Calculate the average length of the cells. Show your working.

answers

6000(um)/55 (cells)=; 109um;

Comments

What is meant by the term wilting?

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP1QN01

What is meant by the term wilting?

answers

Is when the rate of water loss is more than the rate of absorption and the plant droops;

Comments

Why is it recommended to keep the stage of the microscope dry?

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2012PP1QN12

Why is it recommended to keep the stage of the microscope dry?

answers

Avoid refraction of light; .
Prevent wetting of the slide;

Comments

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Biology Questions and Answers

Identify the use of the following apparatus (3mks)

​(i) Bait trap

​(ii) Specimen bottle

​(iii) Pitfall trap

​Introduction to Biology

​Motor vehicles move, use energy and produce carbon dioxide and water. Similar characteristics occur in living organisms yet motor vehicles are not classified as living. List the other characteristics of living things that do NOT occur in motor vehicles.

State one importance of irritability to living organisms.

Give one reason why the coarse adjustment knob should not be used to lower the high power objective.

State the function of a mirror in a light microscope.

K.C.S.E Biology Q & A - MODEL 2017PP1QN01

K.C.S.E Biology Q & A - MODEL 2016PP1QN26

K.C.S.E Biology Q & A - MODEL 2016PP1QN017

What is meant by the term binomial nomenclature?

A student drew a 6cm long diagram of a plant flower. If the actual length of the flower was 12cm, calculate the magnification of the drawing made by the student. Show your working.

K.C.S.E Biology Q & A - MODEL 2014PP1QN01

State two characteristics of living organisms that are specific to plants.

Using a microscope, a student counted 55 cells a cross a field of view whose diameter was 6000pm. Calculate the average length of the cells. Show your working.

What is meant by the term wilting?

Why is it recommended to keep the stage of the microscope dry?

TOPICS

Form 2

Form 3

Form 4

Archives

Categories

(i) Bait trap

(ii) Specimen bottle

(iii) Pitfall trap

Introduction to Biology

Motor vehicles move, use energy and produce carbon dioxide and water. Similar characteristics occur in living organisms yet motor vehicles are not classified as living. List the other characteristics of living things that do NOT occur in motor vehicles.