FORM SIX BIOLOGY NECTA 2015

THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL
ADVANCED CERTIFICATE OF SECONDARY EDUCATION
EXAMINATION

133/2 BIOLOGY 2

For Both School and Private Candidates)

Time: 3 Hours Tuesday, 12th May 2015 p.m.

Instructions

1. This paper consists of eight (8) questions in sections A. B. C and D. 

2. Answer five questions by choosing at least one (I) question from each section. 

3. Each question carries twenty (20) marks.

4. Except for diagrams that must be drawn in pencil, all writing should be in blue or black ink.  

5. Cellular phones are not allowed in the examination room.

6. Write your Examination Number on every page of your answer booklet(s).

SECTION A

1.(a) Give five reasons to justify the kingdom to which Agaricus belongs.

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(b)      With examples, explain five advantages of kingdom Plantae to human beings.

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2.(i) Identify divisions of the kingdom Plantae.

(ii) State three general characteristics of each division identified in 2(a) (i).

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(b)      Draw the structure of a moss plant and show sporophyte and gametophyte generations.

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SECTION B

3.         Explain four common disorders of the urinary system in human, their causes and symptoms.

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4.         (a) Describe five general roles of the liver in mammalian body (b) Explain how urea is formed in the mammalian liver.

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SECTION C

5. Figure 1 shows a typical cell cycle of higher plants and animals. Identify five events which take place in each stage indicated by letters Gl S, G2 and M respectively.

Figure 1

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6. (a) Give five differences between mitosis and meiosis.

image(b) Analyze five significance of mitosis in living organisms.

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SECTION D

7. A homozygous purple-flowered short-stemmed plant was crossed with a homozygous red-flowered long-stemmed plant and the Fl phenotypes had purple flowers and short stems. When the Fl was test crossed with a double homozygous recessive plant the following progeny were produced:

52 purple flower, short stem

47. purple flower, long stem 

49 red flower, short stem 

45 red flower, long stem.

(a)Which characters were dominant and why?

(b) Carry out crosses to show the formation of Fl and F?

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8. Interpret ecological pyramids and state three limitations of each.

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