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)