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(a) an increase in external environmental temperature (linearly) increases the body temperature of animal A.
(b) (i) Poikilotherms / exotherms ;
(ii) Homoiotherms / endotherms;
sharon kalunda answered the question on May 29, 2019 at 10:06
- The table below shows the energy use per day in kilojoule.
(a) From the table, explain why after age 8 males require more energy than females....(Solved)
The table below shows the energy use per day in kilojoule.
(a) From the table, explain why after age 8 males require more energy than females.
(b) Other than sex and age, name three other factors that determine energy requirements in human being.
Date posted: May 29, 2019. Answers (1)
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State the name given to the Study of chemical compounds and the reaction they take part in.
Date posted: May 29, 2019. Answers (1)
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(a) Name the physical process...(Solved)
The diagram below represents passage of a meal through the human digestive system.Study the diagram and answer the question that follow.
(a) Name the physical process that will occur in the mouth cavity.
(b) Name the digestive juice C.
(c) Name the gland that secrete digestive juice B.
Date posted: May 29, 2019. Answers (1)
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Below is a diagrammatic summary of the main biochemical events in photosynthesis. Study it
carefully and answer the questions that follow.
(a) Suggest the identity of molecule P.
(b) Name the gas represented by letter W.
(c) Name the specific site for the reactions in stage A.
(d) Name reaction Z.
Date posted: May 29, 2019. Answers (1)
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Name the disease caused by the following parasite Entamoeba histolytica.
Date posted: May 29, 2019. Answers (1)
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Name the disease caused by the following parasite Salmonella typhi.
Date posted: May 29, 2019. Answers (1)
- The percentage germination of certain seeds at different temperature was determined as follows.
a) Using a suitable scale plot a graph of % germination against temperature
b)...(Solved)
The percentage germination of certain seeds at different temperature was determined as follows.
a) Using a suitable scale plot a graph of % germination against temperature
b) ccount for % germination at
i) 0°C
ii) 30°C
iii) 50°C
Date posted: May 29, 2019. Answers (1)
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State the factors that determine seed viability.
Date posted: May 29, 2019. Answers (1)
- An experiment was set up to study the response of woodlice to light. Ten woodlice were placed in a glass tube. After five minutes
one end...(Solved)
An experiment was set up to study the response of woodlice to light. Ten woodlice were placed in a glass tube. After five minutesone end of the tube was covered with black paper to make it dark. The number of woodlice in light and dark was then recorded every minute for five minutes.The diagram below shows the apparatus used.
The table below shows the results of the experiment.
i) Why were the woodlice left there for five minutes before the pack paper was placed on the tube?
ii) Complete the line graph on the grid below to show the number of woodlice found in the dark at each minute during the
experiment. The results for woodlice in light have already been plotted.
iii) State a conclusion which can be drawn from the results of this experiment.
c) A student repeated this experiment.
i) How could the design be changed to make the results more reliable?
ii) State one environmental factor which would be kept the same to allow a valid comparison with the first experiment.
Date posted: May 29, 2019. Answers (1)
- In an investigation, young plant shoots were exposed to 48hrs of light from above or from one side only. Their growth responses are shown in...(Solved)
In an investigation, young plant shoots were exposed to 48hrs of light from above or from one side only. Their growth responses are shown in the diagrams below.
i) Name the response shown by the shoots and explain the advantages of this response to the plants.
ii) Account for the growth response of shoot B after 48 hours.
Date posted: May 29, 2019. Answers (1)
- A group of students set up the following experiments to investigate the factors that affect enzymes
a) Identify the property of enzymes being investigated in tubes...(Solved)
A group of students set up the following experiments to investigate the factors that affect enzymes
a) Identify the property of enzymes being investigated in tubes 1 and 2.
b) After 3 hours the students tested the content in the four tubes for starch. They obtained the following results in tube 2, 3 and 4.
Tube 2 - Blue-black colour
Tube 3 - Brown colour of iodine remained
Tube 4 - Blue black colour.
Account for the results obtained in tube 3 and 4.
c) What results would you expect in tube 3 if temperature was maintained at 5°C? Give a reason for your answer.
Date posted: May 29, 2019. Answers (1)
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What problems are experienced by fresh water and marine fish in their habitats.
Date posted: May 29, 2019. Answers (1)
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Work out a cross between a haemophilic man married to a carrier woman for haemophilia.
Date posted: May 29, 2019. Answers (1)
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Explain why certain bacteria and other pathogens become resistant to drugs after sometime.
Date posted: May 29, 2019. Answers (1)
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Complete the table below which shows some parasites and the disease they cause.
Date posted: May 29, 2019. Answers (1)
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Name the disease caused by the schistosoma.
Date posted: May 29, 2019. Answers (1)
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State four adaptive features that make schistosoma a successful endoparasite.
Date posted: May 29, 2019. Answers (1)
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State two functions of muscles found in the reproductive system in females.
Date posted: May 29, 2019. Answers (1)
- Below is a simplified diagram of a flower.
i) Suggest its agent of pollination.
ii) Name the type of ovary shown above.
iii) Explain one observable...(Solved)
Below is a simplified diagram of a flower.
i) Suggest its agent of pollination.
ii) Name the type of ovary shown above.
iii) Explain one observable mechanism that will hinder self pollination and fertilization in the above flower.
Date posted: May 29, 2019. Answers (1)
- The diagram below represents part of a mammalian respiratory system.
a) Name the structure.
b) State two observable ways in which the structure is suited to...(Solved)
The diagram below represents part of a mammalian respiratory system.
a) Name the structure.
b) State two observable ways in which the structure is suited to its function.
Date posted: May 29, 2019. Answers (1)