With the aid of a well labelled diagram, describe the process through which a stack is formed. (Answered)
Explain how the following factors determine the effectiveness of wave erosion along the coast.
i) Nature of the material transported by waves.
ii) Nature of the coastal rocks. (Answered)
Name two types of submerged coasts. (Answered)
State two features that form as a result of submergence of coasts. (Answered)
State two causes of submergence of coasts. (Answered)
While investigating a certain metabolic process in plants, students set up the apparatus as shown below in a classroom and monitored it for 48 hours.
(a) Identify the metabolic process under investigation.
b) Account for the observations made in the test tube at the end of the investigation. (Answered)
The amount of blood flowing through a certain parts in the mammalian body at different activity levels was measured and results tabulated as shown in the table below.
(a) Account for:
(i) The high blood flow through cardiac and skeletal muscles during strenuous exercises.
(ii) The results obtained for the alimentary canal at rest. (Answered)
Name two wastes materials excreted by both the skin and the kidney. (Answered)
Name two products of respiration in plants. (Answered)
State three activities in human digestive system that depend on respiration. (Answered)
Explain why short distance runners breathe quickly and deeply at the end of the race. (Answered)
In an experiment on respiration, a mouse was observed to have inhaled #200cm^3# of oxygen and exhaled #199.75cm^3# of carbon (IV) oxide in ten minutes.
a)Identify the possible food substance consumed by the mouse.
b)State the fate of the excess food name in (a) above in the human body. (Answered)
The diagram below show an experimental set up to investigate a certain physiological process in plants.
(a) State the aim of the experiment.
b) State the role of the following in the experiment.
(i) Potassium hydroxide
ii) Aluminium foil.
(c) Account for the expected colour change in the tube F. (Answered)
Name the three end products of anaerobic respiration in plants. (Answered)
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. (Answered)
a)Name the type of respiration that is most efficient.
b) Give a reason for your answer in (a) above. (Answered)
Name the site of anaerobic respiration in a cell. (Answered)
Give two differences in the products of anaerobic respiration between plants and animals. (Answered)
In an experiment, disinfected soaked bean seeds were put in a vacuum flask which was then fitted with a thermometer as shown in the diagram below.
The temperature readings were taken every morning for three consecutive days.
(a) Which process was being investigated?
b) (i) What were the expected results?
ii) Account for the answer in (b) (i) above
c)Why were the seeds disinfected?
d) Why was a (Answered)
State two ways in which anaerobic respiration is applied in industries. (Answered)
How are the mitochondria adapted to their function? (Answered)
Explain how anaerobic respiration is applied in sewage treatment. (Answered)
Explain what happens when there is oxygen debt in human muscles. (Answered)
Give three factors that determine the amount of energy a human being require in a day. (Answered)
Name the products of anaerobic respiration in
(i) Plants
ii) Animals (Answered)
What is the end product of respiration in animals when there is insufficient oxygen supply? (Answered)
A dog weighing 15.2kg requires 216kj while a mouse weighing 50g requires 2736kj per day. Explain. (Answered)
State the economic importance of anaerobic respiration in plants. (Answered)
In what form is energy stored in muscles (Answered)
Name the substance which accumulates in muscles when respiration occurs with insufficient oxygen. (Answered)
Other than carbon dioxide, name other products of anaerobic respiration (Answered)
A process that occurs in plants is represented by the equation below.
#C_6H_12O_6 2C_2H_5OH+2CO_2#+ Energy
(a) Name the process
(b)State the economic importance of the process named in (a) above (Answered)
Describe mechanisms of opening and closing of stomata (Answered)
Describe the Process of inhalation in mammals (Answered)
Give two reasons why accumulation of lactic acid during vigorous exercise leads to an increase in heartbeat. (Answered)
What are the three end products of anaerobic respiration in plants? (Answered)
The diagram below shows a set up that was used to demonstrate fermentation.
Glucose solution was boiled and oil added on top of it. The glucose solution was then allowed to cool before yeast suspension was added.
(a) Why was the glucose solution boiled before adding the yeast?
(b) What was the important of cooling the glucose solution before adding
the yeast?
(c) What was the use of oil in the (Answered)
A person accidentally touches a hot pan and responds as illustrated in the diagram below.
Explain how the response illustrated above occurs. (Answered)
Distinguish between a simple and conditioned reflex action. (Answered)
The diagram below represents a set up during an experiment
(a) (i) What was the experiment investigating?
ii) State the likely identify for substance K
iii) Explain your answer in (a) (ii) above
b) Account for the observation made in flask 2 (Answered)
Below are components of a simple reflex pathway:
Interneurone
Muscle
Motor neurone
Sensory neurone
Pain receptor
Central nervous system
List the components in their proper sequence during transmission of a nerve impulse (Answered)
The diagram below represents the transverse section of the spinal cord.
(a) Name the part labeled H
(b) State two function of the fluid found in the parts labeled J
c) Give a reason for the colour of the white matter (Answered)
Give a reason why image is not formed when light is focused on blind spot (Answered)
The diagram illustrates a nerve cell.
(a) Name the type of nerve cell illustrated
(b) Give a reason for your answer
(c) Identify the part labeled J (Answered)
State the function of each of the following parts of a mammalian eye.
(a) Eye lashes
(b) Lachrymal glands (Answered)
State three differences between tactic and tropic responses (Answered)
The diagram below represents the human ear.
(a) Name the parts labeled E, F and G
(b) How is each of the following adapted to its function?
(i) External auditory meatus
c) Name one defect of the human ear. (Answered)
The diagram below illustrates a defect in the eye.
Explain how the defect illustrated above can be corrected. (Answered)