Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.
Ask, answer and revise exam-style questions across Kenyan subjects and professional courses.
3403 Questions View: All Solved Unsolved
The photomicrographs 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 labelled K. (ii) Give a reason for your answer in (b) (i) above.
State four characteristics of fruit dispersed by animals.
The diagram below illustrates a growing pollen tube. (a) Name the part labeled B. (b) Explain the role of the parts labeled A.
Name the flower part that produces gametes.
Name three mechanisms that ensure cross pollination takes place in flowering plants.
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.
The diagram below represent 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
Distinguish between protandry and protogyny
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.
Name the part of the flower that develops into (a) Seed (b) Fruit
(a) What is meant by the terms (i) Epigynous flower (ii) Staminate flower (b) How are the male parts of wind pollinated flowers adapted to their function?
How do the male gamete nuclei reach the ovule after pollen grains land on the stigma?
Name the parts of the flower that are responsible the production of gametes.
State two disadvantages of self-pollination
A flower was found to have the following characteristics: Inconspicuous petals 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 flower?
State three characteristics that ensures cross-pollination takes place in flowering plants.
Name two benefits that a parasite derives from the host
(a) Name the organism that: (i) Causes malaria; (ii) Transmits malaria (b) State two control measures for malaria.
Name the process through which free atmospheric nitrogen is converted into nitrates
The diagram below represents a certain plant. (a) What is the likely habitat for the plant? (b) Give two reasons for your answer in (a)
The figure below illustrates a food web in a certain ecosystem. From the food web: (a) Draw the shortest food chain; (b) Identify the organisms with the highest (i) Number of predators; (ii) Biomass.
The diagram below shows a transverse section of a leaf. (a) Name the habitat of the plant from which the leaf is obtained. (b) Give two reasons for your answer in (a) above.
State two ways in which aerenchyma tissue in aquatic plants are adapted to their function.
Other than using the quadrat, give two methods of estimating population of grass.
Name two benefits that a parasites derives from the hosts.
State two characteristics of aerenchyma tissue.
Describe the three characteristics of a population
State one way by which HIV/ AIDS is transmitted from mother to child.
State two ways in which schistosoma species is adapted to parasitic mode of life.
(a) Distinguish between population and community. (b) Name a method that could be used to estimate the population size of the following organisms (i) Fish in a pond (ii) Black jack in a garden