(a)Name the kingdom whose members have cell walls made of chitin and feed by absorbing digested food.[1]
(b)State two rules followed when writing the scientific name of an organism.[2]
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KCSE Biology231
2 papers160 marks4 h
What we predict comes up
From the syllabus weighting and how the papers are usually set. The papers below follow it.
- Excretion and homeostasis14%The kidney and blood sugar regulation appear most years, and Question 6 data is often on homeostasis.
- Nutrition in plants and animals13%Photosynthesis and human digestion are heavily tested and are a frequent Paper 2 essay.
- Gaseous exchange and respiration12%Gaseous exchange structures and respiratory quotient questions are KCSE favourites, often as an essay.
- Transport in plants and animals10%The heart, blood and transpiration recur in both papers.
Paper 1 (Theory)
2 h · 80 marks · Calculator allowed
- Answer all the questions in the spaces provided.
- Answers must be written in English.
Answer or mark a question and your score adds up here.
Answer all the questions80 marks
An organism has a body divided into head, thorax and abdomen, three pairs of jointed legs and two pairs of wings.
(a)Name the phylum to which the organism belongs.[1]
(b)Name its class.[1]
A student viewed onion epidermal cells under a light microscope using an eyepiece lens marked ×10 and an objective lens marked ×40.
(a)Calculate the magnification of the image.[1]
(b)State the function of the diaphragm of the microscope.[1]
(c)Why was the specimen stained with iodine solution before viewing?[1]
27 more questions
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Not included: Paper 3 (231/3), the practical examination with real specimens, is left out because it needs a laboratory.