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

BIOLOGY

(For Both School and Private Candidates)

Time: 3 Hours Year: 2003

SECTION A

1. For each of the items (i) — (x) choose the correct answer from the given alternatives and write its letter beside the item number.

(i)The release of an egg cell from the ovary is known as:

1. Evolution
2. Menstruation
3. Ovulation
4. Ecdysis
5. Parturition

(ii) Maintenance of a constant internal environment means:

1. Osmoregulation
2. Excretion
3. Re-absorption
4. Homeostasis
5. Secretion

(iii) If a parent cell has 12 chromosomes, how many chromosomes will be in the daughter cells formed after meiosis?

1. Six (6) 
2. Twelve (12) 
3. Eighteen (18)
4. Twenty(20)
5. Thirty six (36)

(iv)Viruses are considered to be non-living because:

1. They are only active in the contents of a living cell
2. They have true nuclei 
3. The body is covered by a cell wall
4. They are single-cell eukaryotic organisms. 
5. They are multicellular organisms.

(v)Study Fig. 1 below carefully, and answer the question below. The aim of the experiment was to investigate the 

Figure 1

1. Use of aluminium foil on plant leaves
2. Necessity of chlorophyll for photosynthesis 
3. Necessity of light for photosynthesis
4. Presence of starch in the leaf
5. Importance of water in photosynthesis

(vi) Which of the following joints allow movements in one plane only?

1. Ball and socket 
2. Gliding
3. Hinge
4. Immovable 
5. Gliding and immovable

(vii) The stamen of a flower consists of:

1. Stigma and ovary
2. Anther and stamen 
3. Filament and ovary 
4. Anther and filament
5. Ovary and anther

(viii) An experiment:

1. always guarantees scientific conclusion
2. should always be carried out in the laboratory
3. suggests a hypothesis
4. is valid only when it is carried out with a control 
5. must start with a hypothesis and end up with the identification of a problem.

(ix) In which of the following tissues can rapid mitotic cell division be seen?

1. Nerve
2. Heart
3. Embryonic
4. Muscle
5. Epidermal

(x) Which of the following series of activities take place together when focusing distant objects?

1.  Ciliary muscles relax and the lens becomes thin
2. Ciliary muscles contract and the lens becomes thin 
3. Ciliary muscles contract and the lens becomes thick
4. Ciliary muscles relax and the lens becomes thick
5. Ciliary muscles relax and pull the lens into its normal round shape.