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.
0 Comments
K.C.S.E Biology Q & A - MODEL 2014PP1QN05
The diagram below shows a set up for an experiment to demonstrate a certain physiological process.
​(a) What nature of solution is represented by 20% sugar solution?
(b) Explain the observation made on the set up after one hour.
ANSWERS
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 2013PP2QN03
(a) Explain the importance of the following in photosynthesis:
(i) light; (ii) carbon(IV) oxide; (iii) chlorophyll.
(b) Name one appropriate food substance for each of the following enzymes:
(i) ptyalin (ii) pepsin (c) State the cause and two symptoms of Ben-ben. Cause Symptoms ​
answers
​(a) (i) Provides energy needed to split water molecules into oxygen and hydrogen/photolysis;
Provides energy for formation of ATP molecules (which is used in dark stage) (ii) Combines with hydrogen ions to make glucose; (iii) Used to trap light energy; (b) (i) Starch; (ii) Protein; (c) (i) Lack of vitamin B1/thiamine; (ii) . Stunted growth; Paralysis of legs/arms/limbs/damage to peripheral nerves; Heart failure Swelling of feet/oedema Gastrointestinal disturbances/loss of appetite/constipation/diarrhoea/vomiting; Weight loss/muscle wasting Pale skin 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
K.C.S.E Biology Q & A - MODEL 2013PP1QN30
State two ways in which osmosis is significant to plants.
answers
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 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; K.C.S.E Biology Q & A - MODEL 2013PP1QN09
State one way in which each of the following is structurally adapted to its function:
(a) neurone; (b) mitochondrion.
answers
a)Presence of myelin sheath for insulationlincreases transmission; Axon for transmission of impulses;
Large cell body controls activites of cell; Nerve endings/dendrites receives impulses from receptors cells; Node of Ranvier speeds up impulse transmission. (b) Inner membrane highly folded/cristae to increase S A for attachment of (respiratory) enzymes.
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 --;
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 2013PP1QN05
Describe how turgor pressure builds up.
answer
K.C.S.E Biology Q & A - MODEL 2013PP1QN04
Explain how age determines a person’s energy requirements.
answers
K.C.S.E Biology Q & A - MODEL 2013PP1QN04
State two roles of mucus in the stomach.
answers
K.C.S.E Biology Q & A - MODEL 2013PP1QN03
Name the taxonomic unit that comes immediately after a phylum in classification.
answers
K.C.S.E Biology Q & A - MODEL 2013PP1QN03
State two external features found in the class Mammalia only.
answers
K.C.S.E Biology Q & A - MODEL 2013PP1QN02
The diagram below represents a cell as seen under an electron microscope.
​(a) Based on the diagram, state whether it represents an animal cell or a plant cell.
(b) Give two reasons for your answer in 2(a) above. (c) Why is the palisade layer a tissue?
answers
​(a) Animal cell;
(b) Has cell membrane only/has no cell wall; Has numerous small vacuoles; Has central nucleus; (c) Consists of many similar cells performing the same function;
K.C.S.E Biology Q & A - MODEL 2013PP1QN01
Explain how an increase in temperature affects the rate of active transport.
answers
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 2012PP2QN03
(a) In an investigation, equal amounts of water was placed in. three test-tubes labelled G, H and J. Pondweeds of equal length were dropped in each test tube. The test-tubes were then placed in identical conditions of light and carbon (IV) oxide at different temperatures for five minutes. After the five minutes, the bubbles produced in each test-tube were counted for one minute. The results were as shown in the table below.
​(i) Name one requirement for this process that is not mentioned in the investigation.
(ii) Name the gas produced in this investigation. (iii) Account for the results in test-tubes H and J. (b) State two ways in which the human intestinal villus is adapted to its function.
answers
​(a) (i) chlorophyll;
(ii) oxygen; (1 mark) (iii) Test tube H is at optimum temperature for enzyme activity; hence high rate of photosynthesis/more bubbles. In test tube J most enzymes have been denaturedby the high temperature; hence low rate of photosynthesis/fewer bubbles. (b) — The villus epithelium is thin; for faster diffusion of dissolved food substances; — The epithelium has goblet cells; which produce mucus to lubricate food passage; — They have microvilli; which further increase their surface area for absorption; Have lacteal; for absorption of fatty acid & glycerol/transportation of lipids; Highly vascularised; for absorption of digested food. K.C.S.E Biology Q & A - MODEL 2012PP1QN30
Name the organelle that is involved in each of the following:
(a) manufacture of lipids (b) formation of lysosomes
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN29
Name two nutrients that are absorbed without being digested by enzymes in humans.
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN27
What is the function of contractile vacuoles in amoeba?
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN19
List four symptoms of diabetes mellitus.
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN16
The diagram below represents an experimental set-up used by students to investigate a certain process.
​Flower Q produced seeds while P did not. Account for the results.
answers
|
Archives
December 2024
Categories
All
TOPICSFORM 1
Form 2
Form 3
Form 4
|
Can't find what you are looking for? Don't worry, Use the Search Box Below.
Primary Resources
College Resources
|
Secondary Resources
|
Contact Us
Manyam Franchise
P.O Box 1189 - 40200 Kisii Tel: 0728 450 424 Tel: 0738 619 279 E-mail - sales@manyamfranchise.com |