Identify the use of the following apparatus (3mks)(i) Bait trap
For attracting and trapping small animals including rats
(ii) Specimen bottle
For keeping collected specimen;
(iii) Pitfall trap
For catching crawling animals;
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Introduction to Biology
1. 1995 Q 1 P1
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.
K.C.S.E Biology Q & A - MODEL 2019PP2QN03
State one importance of irritability to living organisms.
answers
​(a) Enable living organisms to avoid dangerous/harmful/hash climatic environmental conditions; Enable living organisms obtain/access favourable environmental conditions (light, water, oxygen,
Give one reason why the coarse adjustment knob should not be used to lower the high power objective.30/6/2020
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
K.C.S.E Biology Q & A - MODEL 2017PP1QN09
State the function of a mirror in a light microscope.
answers
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; 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
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
K.C.S.E Biology Q & A - MODEL 2015PP1QN01
What is meant by the term binomial nomenclature?
answer
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.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;
K.C.S.E Biology Q & A - MODEL 2013PP1QN13
State two characteristics of living organisms that are specific to plants.
answers
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;
K.C.S.E Biology Q & A - MODEL 2013PP1QN01
What is meant by the term wilting?
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN12
Why is it recommended to keep the stage of the microscope dry?
answers
Name the part of a light microscope used to bring an image of a specimen into sharp focus.26/6/2020
K.C.S.E Biology Q & A - MODEL 2012PP1QN12
Name the part of a light microscope used to bring an image of a specimen into sharp focus.
answer
K.C.S.E Biology Q & A - MODEL 2012PP1QN10
What is meant by the term irritability?
answers
K.C.S.E Biology Q & A - MODEL 2011PP2QN01
The set-up below illustrates a procedure that was carried out in the laboratory with a leaf plucked from a green plant that had been growing in sunlight.
(i) What was the purpose of the above procedure?
(ii) Give reasons for carrying out steps A, B and C in this procedure. A B C (iii) Name the reagent that was used at the step labelled D. (iv) State the expected result on the leaf after adding the reagent named in (iii) above.
ANSWERS
​(i) - Testing a leaf for the presence of starch;
(ii) - A - kill the leaf/break down cells/stop enzymatic activity; B - Removal of chlorophyll; C - Soften leaf/makes leaf less brittle; (iii) Iodine solution; (iv) Areas where starch is present stain blue/blue black; 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 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 2011PP1QN04
State one use for each of the following apparatus in the study of living organisms.
(a) Pooter (b) Pitfall trap
answers
(a) Sucking small insects/animals;
(b) A trap into which small animals fall and get trapped; K.C.S.E Biology Q & A - MODEL 2009PP1QN03
State the functions of the following parts of a light microscope
(a) Objective lens (b) Diaphragm
ANSWERS
K.C.S.E Biology Q & A - MODEL 2007PP1QN02
Give a reason why staining is necessary when preparing specimens for observation under the microscope
ANSWER
K.C.S.E Biology Q & A - MODEL 2001PP1QN01
Other than having many features in common, state the other characteristics of a species
ANSWERS
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