Explain/ describe how the placenta is adapted/ suited to its function.(Answered) Describe the process of fertilization in human beings.(Answered) How is the human male reproductive system adapted/ suited to its function.(Answered) How is the human female reproductive system adapted/ suited to its function?(Answered) Using relevant examples, describe how fruits and seeds are adapted/ suited to various methods of dispersal.(Answered) Describe the adaptations of a named wind pollinated/ anemophilous flowers(Answered) Describe the adaptations of a named insect pollinated/ entomophilous flowers(Answered) Using relevant examples describe the methods of asexual reproduction.(Answered) Describe the process of cell division.(Answered) Describe the causes, effects and control of water, air and soil pollution.(Answered) Describe how xerophytes, mesophytes, hydrophytes and halophytes are adapted/ suited to their habitats.(Answered) Explain how each of the following may affect population growth of the organisms in a habitat.(Answered) Describe different phases/ stages of population growth in an ecosystem.(Answered) Describe nitrogen cycle/ explain the circulation of nitrogen in the ecosystem.(Answered) Giving examples describe the following biotic factors/ interactions among organisms.(Answered) Explain the economic importance of organisms in each of the following kingdoms.(Answered) Explain the importance of protecting the forest ecosystem with reference to the following.(Answered) Explain the effect of abiotic factors in an ecosystem.(Answered) Describe/ explain different ways through which homoitherms/ endotherms regulate their body temperature.(Answered) Describe how urea is formed and the path it follows from the point of formation until it is eliminated from the body.(Answered) Describe the role of hypothalamus in homeostasis.(Answered) Explain/ describe the role of the liver in homeostasis and excretion.(Answered) Describe/ explain the role of mammalian kidney/ nephron in homeostasis.(Answered) How is the mammalian kidney/ nephron adapted/ suited to its function?(Answered) How does the mammalian kidney/ nephron functions/ describe the process of excretion in the kidney/ explain the role of kidney in eliminating excess amino acids from the body/ how is urine formed?(Answered) Explain how the skin is adapted to protection, excretion and homeostasis.(Answered) How is the mammalian skin adapted/ suited to its function?(Answered) Explain the economic importance of excretory products of plants.(Answered) Explain the process/ methods of excretion in plants/ how does excretion occur in plants?(Answered) Explain the application of anaerobic fermentation/ respiration in the industry and at home.(Answered) Explain the effects of increased physical activity on the following organ systems(Answered) Explain the factors which affect the rate of breathing in humans.(Answered) Describe/ explain the mechanism of breathing/ gaseous exchange in mammals.(Answered) Explain/ describe how the gaseous exchange system in mammals is suited/ adapted to its function.(Answered) Describe the mechanism of gaseous exchange in a bony fish/ tilapia.(Answered) Explain/describe the mechanism of gaseous exchange in a frog.(Answered) Describe/ explain the mechanism of gaseous exchange in insects.(Answered) Describe/ explain the adaptation of tracheal system of insects to its function/ how is the tracheal system of insects suited to gaseous exchange?(Answered) How are respiratory surfaces in animals adapted/ suited to their function?(Answered) 26. Describe the mechanism of gaseous exchange in plants.(Answered) Describe/ explain mechanisms/ theories of opening and closing of stomata/ describe how the presence of chloroplasts in the guard cells affect opening and closing of stomata.(Answered) Describe the path followed by glucose from the time of absorption in the ileum until it enters a muscle cell in the leg.(Answered) Describe how the gaseous exchange structures in plants are adapted to their function.(Answered) Using relevant example explain how allergic reactions take place in human beings.(Answered) Describe the process of blood clotting/ how does blood clotting take place in mammals?(Answered) Explain different functions of mammalian blood and for each mention the component involved.(Answered) Describe how the cellular components of mammalian blood are adapted to their functions/ Describe how human blood is adapted to its function.(Answered) Describe how carbon (IV) oxide produced by the liver cell reaches alveoli cavities in the mammalian lungs.(Answered) Explain the mechanism involved and the pathway taken by oxygen in human beings from the atmosphere to the liver cells.(Answered) Describe/ explain the transport of the following gases in blood.(Answered) How is the mammalian heart structurally adapted to its function.(Answered) Explain/ describe the pumping mechanism of the mammalian heart.(Answered) Describe/ explain how blood circulation in mammals take place.(Answered) Describe/ explain how environmental factors affect the rate of transpiration.(Answered) Describe how the structural factors which affect the rate of transpiration.(Answered) Describe the movement of water from the soil to the atmosphere through the leaves.(Answered) How are villi suited/ adapted to their function?(Answered) How are small intestines / ileum adapted/ suited to its function?(Answered) Describe what happens to a meal rich in carbohydrates, proteins and lipids (fatty meal of ugali, and eggs) along the alimentary canal from ingestion to egestion.(Answered) Describe how various parts of the alimentary canal/ digestive system are adapted/ suited to their functions.(Answered) Describe the role played by each of the following in human beings(Answered) Describe how various factors affect the rate of photosynthesis.(Answered) Explain the formation of starch in green plants.(Answered) Describe how the leaf is adapted/ suited to photosynthesis.(Answered) An experiment was carried out to determine the rate of transpiration in three plants A, B and C. Plants A and B belonged to different species while plants B and C belonged to the same species. Plant C had all its leaves removed. The three plants were of similar size and were exposed to the same environmental conditions. The results are
as shown below in the graphs below:
Suggest the habitat for (Answered) Explain how water from the soil reaches the structure labeled L.(Answered) The diagram below represents a transverse section of a young stem.
(a)State the functions of the parts labeled C, D and E.
(b)List three differences between the section shown above and one that would be obtained from the root of the same plant.(Answered) Describe the mode of reproduction in a named fungus.(Answered) The photographs below show the various stages of cell division in a certain plant.
(a)(i)Name the type of cell division illustrated.
(ii)Give a reason for your answer in (a)(i) above
(b)(i) Name the stage of cell division labeled K.
(ii) Give a reason for your answer in (b) (i) above.(Answered) State four characteristics of fruits dispersed by animals.(Answered) The diagram below illustrates a growing pollen tube.
(a) Name the part labeled B
(b) Explain the role of the parts A.(Answered) Name the flower part that produces gametes.(Answered) Name three mechanisms that ensure cross pollination takes place in flowering plants.(Answered) The diagram below represents an experimental set-up used by students to investigate
a certain process.
Flower Q produced seeds while P did not. Account for the results.
(Answered) The diagram below represents a transverse section of an ovary from a certain flower.
(i) Name the structure labeled W
(ii)Name the type of placentation illustrated in this diagram.(Answered) Describe the process of fertilization in flowering plants.(Answered) How are flowers adapted to wind and insect pollination? Insect pollinated flowers
(entomophilus)(Answered) Distinguish between protandary and protogyny.(Answered) The diagram below shows a stage in mitosis in a plant cell.
(a) Name the stage of mitosis
(b) Give two reasons for your answer in (a) above.
(c)Name the part of the plant from which the cell used in preparation was obtained.(Answered) The diagram below shows a stage during fertilization in a plant.
(i) Name the parts labeled Q, R and S.
(ii) State two functions of the pollen tube.
(Answered) Explain how the following prevent selfpollination
(i) Protandry
(ii)Self-sterility(Answered) Give three advantages of cross pollination(Answered) Name the part of the flower that develops into
(a)Seed
(b)Fruit(Answered) What is meant by the terms
(i) Epigynous flower
(ii)Staminate flower(Answered) How are the male parts of wind pollinated adapted to their function?(Answered) Explain how a seed is formed after an ovule is fertilized.(Answered) What is the importance of cross pollination?(Answered) Fruits formation without fertilization is called?(Answered) Describe how fruits and seeds are suited to their modes of dispersal.(Answered) How do the male gamete nuclei reach the ovule after pollen grains land on the stigma?(Answered) State the change that takes in a flower after fertilization.(Answered) Describe the process of fertilization in a flowering plant(Answered) Name the parts of the flower that are responsible the production of gametes.(Answered) State two disadvantages of self-pollination.(Answered) A flower was found to have the following characteristics: Inconspicuous petal
Long feathery stigma Small, light pollen grains.
(a) What is the likely agent of pollination of the flower?
(b) What is the significance of the long feathery stigma in the flower?(Answered) State three characteristics that ensure cross-pollination takes place in flowering
plants.(Answered) Describe how insect pollinated flowers are adapted to pollination.(Answered) State two functions of the placenta in mammals.(Answered) How is the human sperm cell structurally specialized?(Answered) Name two substances that leave the foetal blood through the placenta.(Answered)
