K.C.S.E Biology Q & A - MODEL 2012PP1QN15
What name is given to a group of hormones that controls the development of secondary sexual characteristics in a human male?
answer
0 Comments
K.C.S.E Biology Q & A - MODEL 2012PP1QN14
Name the type of respiration that is most efficient.
b) Give a reason for your answer in (a) above
answer
a)Aerobic respiration;
b)It releases more energy per unit mass;
K.C.S.E Biology Q & A - MODEL 2012PP1QN13
State three factors that affect the rate of diffusion.
answers
Temperature; surface area; distance that particles have to travel; diffusion/concentration gradient; size/density of particles; surface area to volume ratio; thickness of membrane; medium of diffusion
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 2012PP1QN11
Name the muscles found in the following organs:
stomach; bone
answers
K.C.S.E Biology Q & A - MODEL 2012PP1QN11
State two ways in which heart muscles are special.
answers
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 2012PP1QN09
State the importance of negative phototaxis to termites.
answer
What is the probability of a couple with blood group AB getting a child with blood group AB?26/6/2020
K.C.S.E Biology Q & A - MODEL 2012PP1QN08
What is the probability of a couple with blood group AB getting a child with blood group AB?K.C.S.E Biology Q & A - MODEL 2012PP1QN07
The diagram below represents a set-up that students used in an investigation.
(a) Name the physiological process that was being investigated.
(b) State the role of potassium hydroxide in flask K. (c) Account for the observation in boiling tube L and flask N. L . N
answers
(a) Respiration/aerobic respiration;
(b) Flask K Potassium hydroxide removes Carbon IV Oxide from atmospheric air; (c) L - Lime water remains clear because Carbon (IV) Oxide has been removed; Flask N lime water forms a white precipitate because the respiring cockroaches produce Carbon (IV) Ovide; K.C.S.E Biology Q & A - MODEL 2012PP1QN06
The diagram below represents part of the gaseous exchange system in human.
(a) Name the parts labelled F and G.
F G (b) State one function of each of the parts labelled H and J. H J
answers
(a) F - Bronchiole;
G - Intercostal muscles/external intercostal muscles; (b) H - (Pleural membranes) secretes encloses pleural fluid to lubricate lungs/protect lungs; J - (Diaphragm) separates chest cavity from abdominal cavity/works to effect volume and pressure changes in chest cavity necessary for inhalation and exhalation! Ventilation/breathmg; K.C.S.E Biology Q & A - MODEL 2012PP1QN05
The table below shows results of a study of three plants C, D and E growing in different habitats.
(a) Which one of the plants C, D and E grows in an area of relatively low water availability?
(b) Explain your answer in (i) above.
answers
(a) Plant C;
(b) Thick cuticle reduces water loss; Low number of stomata reduces water loss; Large root-surface area enhances water absorption; K.C.S.E Biology Q & A - MODEL 2012PP1QN04
In an investigation, a student extracted three pieces of paw paw cylinders using a cork borer.
The cylinders were cut back to 50 mm length and placed in a beaker containing a solution. The results after 40 minutes were as shown in the table below.
(a) Account for the results in the table above.
(b) What would be a suitable control set-up for the investigation?
answers
(a) The solution was hypotonic/less concentrated compared to the cell sap of pawpaw cylinder cells;
The tissue/cells gained water by osmosis; becoming turgid/longer/stiff; (b) Pawpaw cylinders of the same size/length; placed in an isotonic solution; Boiled potato cylinders of the same size; placed in a similar solution; K.C.S.E Biology Q & A - MODEL 2012PP1QN03
The figure below is a fine structure of a generalised animal cell as seen under an electron microscope.
(a) Name the parts labelled A and B.
A B (b) How is the structure labelled B adapted to its function?
answers
(a) (i) A - nucleopore;
B - Rough Endoplastic Reticulum; (b) Surface covered with ribosomes; for protein synthesis; Has interconnected channels: for transportation of proteins; 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
K.C.S.E Biology Q & A - MODEL 2012PP1QN01
How does nutrition as a characteristic of living organisms differ in plants and animals?
answers
|
Archives
December 2024
Categories
All
TOPICSFORM 1
Form 2
Form 3
Form 4
|
Primary Resources
College Resources
Can't find what you want? Use this Search box. |
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 |