Get premium membership and access questions with answers, video lessons as well as revision papers.
a) Lenticell ;
b) i) Cork cells ;
ii) Cortex ;
iii) Carbon (IV) oxide ;
sharon kalunda answered the question on September 17, 2019 at 14:37
- After an ecological study of feeding relationship students constructed the food web below.(Solved)
After an ecological study of feeding relationship students constructed the food web below.
a) Name the process through which energy from the sun is incorporated into the food web.
b) State the mode of feeding of the birds in the food web.
c) Name two ecosystems in which the organisms in the food web live.
d) From the information in the food web, construct a food chain with the large bird as a quaternary consumer.
e) What would happen to the organism in the food web if bird N migrated?
f) Not all the energy from one trophic level is available to the next level. Explain.
g) i) Two organisms which play a role in the ecosystem are not included in the food web. Name them.
ii) State the role played by the organisms named in g (i) above.
h) i) State three human activities that would affect the ecosystems.
Date posted: September 17, 2019. Answers (1)
- The figure below shows the changes in blood level of hormones that takes during the menstrual cycle in a human female.(Solved)
The figure below shows the changes in blood level of hormones that takes during the menstrual cycle in a human female.
a) Name the hormones whose concentration arte represented by curves X and Y.
b) State two effects of the hormone X during the menstrual cycle.
c) Explain the role of FSH in female reproduction.
d) What is the role of a high concentration of luteinizing hormone?
e) State the fertile period during the menstrual cycle.
Date posted: September 17, 2019. Answers (1)
- The diagram shows a set up to investigate anaerobic respiration in germinating bean seed.(Solved)
The diagram shows a set up to investigate anaerobic respiration in germinating bean seed.
a) What is the purpose of the pyrogallic acid?
b) State the importance of the water bath in the experiment.
c) Write a word equation for anaerobic respiration taking place in the germinating beans.
d) Explain why plants can only respire anaerobically for a short period of time.
e) What would be product if the process was taking place in animal muscle?
f) Distinguish between obligate and facultative Anaerobes.
g) Name the site for anaerobic respiration in a cell.
Date posted: September 17, 2019. Answers (1)
- Leaves are the organs of photosynthesis. The following diagram shows what happens in a plant leaf during photosynthesis.(Solved)
Leaves are the organs of photosynthesis. The following diagram shows what happens in a plant leaf during photosynthesis.
a) Give two ways in which leaves are adapted to absorb light.
b) Name the gases labeled X and Y
c) Explain why it is an advantage for plant to store carbohydrates in form of starch rather than as sugar.
d) Describe what happens during dark stage of photosynthesis.
Date posted: September 17, 2019. Answers (1)
- The figure below represents a reproductive organ of a plant.(Solved)
The figure below represents a reproductive organ of a plant.
a) Which letter represents the structure that produces female gametes ?
b) Name the structure labelled W.
c) Which letter represents the structure where fertilization takes place ?
d) Which letter represents the structure where male gametes are produced ?
Date posted: September 17, 2019. Answers (1)
- The chart below shows the number of chromosomes before and after cell division and fertilisation in a mammal.(Solved)
The chart below shows the number of chromosomes before and after cell division and fertilisation in a mammal.
a) What type of cell division takes place at Z.
b) Where in the body of a female does process X occur ?
c) On the chart, indicate the position of parents and gametes.
Date posted: September 17, 2019. Answers (1)
- The following cells are found at different regions of the apical meristems. Use them to answer the questions that follow.(Solved)
The following cells are found at different regions of the apical meristems. Use them to answer the questions that follow.
a) Rearrange them into three regions.
- zone of cell division
- zone of cell elongation
- zone of cell differentiation
b) Name three specialised tissues formed at the zone of cell differentiation.
Date posted: September 17, 2019. Answers (1)
- The photographs below show whole flower F1 and an open one labeled F2.Examine the photographs of the specimen.(Solved)
The photographs below show whole flower F1 and an open one labeled F2.Examine the photographs of the specimen.
a. Name the part labeled R on the photographs. (1 mark)
b. i) Examine the photographs and state the division of the plant kingdom to which the specimen belongs. Give reason for your answer.
ii) Name the class of the plant from which the photographs of the specimen belong to
iii) Using observable features from photograph F1 and F2 give three reasons for your answer in b (ii) above.
c. i) Name the agent of pollination for the flower in the photograph.
ii) State three observable features from the photographs that support the answer in c(i) above.
Date posted: September 17, 2019. Answers (1)
- Study the diagram shown below and answer the questions that follow.(Solved)
Study the diagram shown below and answer the questions that follow.
a. i) Name the phylum to which the specimen belongs.
ii) State the class to which the organism belongs and give two reasons.
b. What term is used to describe the body shape of the organism in photograph/ diagram below.
c. i) Name the parts labeled A and B.
ii) State the function of the parts labeled C and D.
d. Using observable features from the diagram, state two adaptations of the organisms to locomotion in water.
Date posted: September 17, 2019. Answers (1)
- State three adaptive features which mammals that live in very cold region have.(Solved)
State three adaptive features which mammals that live in very cold region have.
Date posted: September 17, 2019. Answers (1)
- Below is a representation of a biogeochemical cycle.(Solved)
Below is a representation of a biogeochemical cycle.
a. Name the above cycle.
b. What is B and P?
c. Name the microorganism labeled T and R.
d. Name process U and Z
e. Give specific name of a free living bacteria in the biogeochemical cycle.
Date posted: September 17, 2019. Answers (1)
- The diagram below shows a respiratory surface of an organism.(Solved)
The diagram below shows a respiratory surface of an organism.
a. Name the class to which the organism having the respiratory surface belong and state its habitats.
b. Circle the letter on the diagram that represents the specific site where gaseous exchange takes place.
c. Label parts F and G.
d. Name the functions of part labeled G.
e. Give a reason why respiratory surfaces are supplied with a dense network of blood capillaries.
Date posted: September 17, 2019. Answers (1)
- The diagram below represents the structure of part of the placenta and how it is connected to the foetus.(Solved)
The diagram below represents the structure of part of the placenta and how it is connected to the foetus.
a. Name the structure S and T.
b. State one substance which passes in the direction indicated by arrow Q and two substances which pass in the direction indicated by arrow R.
i) Q
ii) R
c. The blood of the mother and that of the foetus does not mix. State one advantage of this to the foetus.
d. i) Name the hormone produced by the structure drawn above.
ii) State the role of hormone named in d(i) above.
Date posted: September 17, 2019. Answers (1)
- In a certain variety of cattle some individuals may have red, white or roan (a mixture of white and red) fur color. A cross between...(Solved)
In a certain variety of cattle some individuals may have red, white or roan (a mixture of white and red) fur color. A cross between a cow with red fur and a bull with white fur produced a calf with roan fur. Using letter R to represent red color and W to represent the white color ; Work out the F1 generation
Date posted: September 17, 2019. Answers (1)
- Explain why the carrying capacity of wild animals is higher than that of cattle for a unit mass.(Solved)
Explain why the carrying capacity of wild animals is higher than that of cattle for a unit mass.
Date posted: September 17, 2019. Answers (1)
- What are the two functions of a pleural membrane that gives the mammal advantage over other organisms?(Solved)
What are the two functions of a pleural membrane that gives the mammal advantage over other organisms?
Date posted: September 17, 2019. Answers (1)
- Explain why blood from the alimentary canal, pass through the liver before entering the general circulation?(Solved)
Explain why blood from the alimentary canal, pass through the liver before entering the general circulation?
Date posted: September 17, 2019. Answers (1)
- Explain the relationship that occurs between the algae and fungi in lichens.(Solved)
Explain the relationship that occurs between the algae and fungi in lichens.
Date posted: September 17, 2019. Answers (1)
- Study carefully the photograph shown below.(Solved)
Study carefully the photograph shown below.
a) (i) Identify the cells above.
(ii) State two functions of the cells shown above.
b) Explain how the above cells are adapted to their function.
c) Name a parasite that may invade and destroy the cells above.
d) Suggest two bones in an adult man, which produce the cells shown above.
Date posted: September 17, 2019. Answers (1)
- Differentiate between miscarriage and premature birth.(Solved)
Differentiate between miscarriage and premature birth.
Date posted: September 17, 2019. Answers (1)