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) What is meant by the term irritability?(Answered) State the importance of negative phototaxis to termites.(Answered) Describe how accommodation in the the human eye is brought about
when focusing on a near object(Answered) The diagram below represents a section of the human brain.
(i) Name the structure labeled P and R
ii) State two functions of the part labeled Q
(Answered) The diagram below shows how the iris and pupil of a human eye appear under
different conditions.
(a) Name the structures labeled X and Y
(b) (i) State the condition that leads to the change in appearance shown in
the diagram labeled B
(ii) Describe the changes that lead to the appearance of the iris
and pupil as shown in the diagram labeled B
(iii) What is the significance of the changes described(Answered) State one function for each of the following
(a) Cerebellum
(b) Medulla oblongata(Answered) Explain why images that form on the blind spot are not perceived(Answered) How does the human eye obtain nutrients(Answered) Explain the changes that take place in the pupil and iris of a human eye when a person moves from a dark room to a room with bright light(Answered) State two characteristics of the image formed on the retina(Answered) Name the part of retina where image is formed(Answered) Describe the structure and functions of the various parts of the human ear.(Answered) Where in the human body are relay neurons found.(Answered) The diagram below represents a reflex arc in human.
(a) Name the part labeled X and Y
b) Name the substance that is responsible for the transmission of an impulse across the synapse(Answered) State the importance of tactic response among some members of kingdom protista.(Answered) Apart from hearing, state another function of the human ear(Answered) The diagram below shows the position of an image formed in a defective eye.
(a) Name the defect
b) Explain how the defect named in (a) above can be corrected(Answered) Describe the functions of the various parts of the human eye(Answered) Describe how semicircular canals performs their functions(Answered) What is the function of the following parts of the mammalian ear?
(i) Tympanic membrane
(ii) Eustachian tube
(iii) Ear ossicles(Answered) What is the function of the following cells in the retina of human eye?
(a) Cones
(b) Rods(Answered) The diagram below shows surface view of a human brain.
(i) Name the parts labeled B and C
(ii) State what would happen if the part labeled B was damaged.(Answered) The diagram below represents a nerve cell.
(a) (i) Identify the nerve cell
ii) Give a reason for your answer in (a) (i) above
(b) Name the structure labeled T
(c) Using an arrow indicate on the diagram the direction of movement of an impulse in the cell.(Answered) In an experiment it was found that when maggots are exposed to light they move to dark areas.
(a) Name the type of response exhibited by the maggots
(b) Name the advantages of the response to the maggots(Answered) A person was able to read a book clearly at arm’s length but not at normal reading distance.
(a) State the defect the person suffered from?
(b) Why was he unable to read the book clearly at normal distance?
(c) How can the defect be corrected?(Answered) State two functional differences between the rods and cones in the human eye(Answered) State the function of ciliary muscles in the human eye(Answered) Describe the location, function and characteristics of three types of muscles in mammalian body.(Answered) How are long bones of limbs suited/ adapted to their function?(Answered) How are the pectoral and pelvic girdles adapted/ suited to their function?(Answered) How are cervical, thoracic, lumbar and sacral vertebrae adapted/ suited to their function? (Answered) Explain/ describe the mechanism of locomotion in finned fish/ How does locomotion occurs in finned fish/ explain/ describe the adaptation of fish to locomotion in its habitat/ water.(Answered) How is the mammalian ear adapted/ suited to its function?(Answered) Describe the process of hearing in mammals.(Answered) Describe the structure and function of various parts of human ear.(Answered) How is the image formed in the eye?(Answered) Explain/ describe how accommodation of the eye is achieved.(Answered) How is the mammalian eye adapted/ suited to its function?(Answered) A person met a leopard as he walked along the forest path and ran away immediately. Explain how the nervous and adrenal glands worked together to bring about the action observed.(Answered) Using an illustration explain what happens when a person touches a hot flame.(Answered) Using relevant example, describe/ explain simple and conditioned reflex action.(Answered) Describe/ explain the roles/ functions of different parts of the mammalian brain.(Answered) Explain the role of auxins in tropisms/ tropic responses.(Answered) Explain how the process of evolution may lead to formation of a new species/adaptation of species to the environment.(Answered) Using examples, explain how natural selection takes place.(Answered) Using relevant example explain industrial melanism.(Answered) Describe how mutations arise and their significance in evolution.(Answered) How does natural selection lead to emergence of new species?(Answered) Describe/ explain different evidences that show that evolution took place.(Answered) Explain/ describe the general application of genetics.(Answered) Describe/explain the role of hormones in metamorphosis in insects.(Answered) Describe/ explain the role of hormones in growth of plants.(Answered) Describe/ explain the process of secondary thickening/ growth in flowering plants.(Answered) Explain various factors/ conditions that influence seed germination.(Answered) Describe the role of hormones in menstruation/ menstrual cycle in human females.(Answered)
