2011 KCSE Biology Paper 2
Past Paper Info
- Source: KCSE Past Paper 2011
- Education Level: Secondary
- Subject: Biology
- Paper: Paper 2
- Score: 80 Marks
- Assessment: Full Paper
The set-up below illustrated a procedure that was carried out in the laboratory with a leaf plucked from a green plant that had been growing in sunlight.
(a) What was the purpose of the above procedure? [1 Mark]
(c)
(b)
(d)
In Humans, hairy ears is controlled by a gene on the Y Chromosome.
(a) Using the letter YH to represent the chromosome carrying the gene for hairy ears, work out a cross between a hairy eared man and his wife. [4 Marks]
(b)
(i) What is the probability of the girls having hairy ears? [1 Mark](ii) Give a reason for your answer in b(i) above. [1 Mark]
(c)
(d)
(a) Name the causative agents for the following respiratory diseases. [1 Mark]
(ii) Pneumonia. [1 Mark]
(b)
(c)
The diagram below represents a section of the human brain.
(a) Name the structures labelled P and R. [2 Marks]
(ii) State two functions of the part labelled Q. [2 Marks]
(b)
(i) Name two reproductive hormones secreted by the pituitary gland in women. [2 Marks](ii) State one function of each of the hormones named in (b)(i) above. [1 Mark]
The diagram below represents a flower
(a) On the diagram, name two structures where meiosis occurs. [2 Marks]
(ii) How is the flower adapted to prevent self-pollination? [2 Marks]
Nexxus
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