BIOLOGY-FORM-1 Abubayda
BIOLOGY-FORM-1 Abubayda
BIOLOGY-FORM-1 Abubayda
CAT 1 TERM 2
BIOLOGY FORM 1
INSTRUCTIONS
Answer all the questions in the spaces provided.
1. What is biology?
(1 mark)
3 a) Name the unit of classification that has the least organisms. (1 mark)
b). Anatomy
1
(a) Name a carbohydrate which forms part of the structure labelled S. (1mark)
(c) Name two structures present in the diagram but absent in the animal cell (2marks)
9 a) An electron microscope has a much greater resolving power than a light microscope. Explain
the meaning of the term resolving power. (1 mark)
b) Give a reason why an electron microscope cannot be used to study life specimen. (1 mark)
13. During a practical lesson to estimate the size of a cell, using the sketch below which some students
observed, calculate the length of one cell in micrometers given that the field of view was 8mm wide.
(3 marks)
2
14. What is meant by the term Entomology? (1 mark)
3
b) The diagram below represents a certain apparatus used by biology students.
Species. (1 mk)
ii) State the function of the organelle identified in 2b(i) above. (1 Mark)
17. If a light microscope had an eye piece lens of X25 and an objective lens of X40, what
would
the total magnification be? (2
mks)
18. a. State the importance of each of the following process in living things. (3 mks)
i. Respiration
4
ii. Gaseous exchange
iii. Reproduction
b. Apart from the characteristics of living things mentioned in (a) above, state any other
4other characteristics common in living things.
(4mks)
19. a). Give a reason why each of the following steps are followed when preparing cross
sections
of a leaf for examination under a microscope:(4mks)
b)Cutting very thin sections
20. Calculate the magnification of the drawing of the termite below given that the actual
length of the termite is 0.9cm long .Show your working (2mks)
22.Peter was using a light microscope to view onion cells with lens combination of eye piece lens X10
and objective lens X20.
a)Calculate the total magnification. (1 mk)
5
b)If he changed the objective lens magnification to X40, would the cells appear bigger or smaller?
Explain. (2 mks)
What is the role of the organelle you have named in (a) above. (1 mk)
25. The diagram below represents the structure of a light microscope. Study it and answer the
questions that follow.
6
b)State the functions of each of the parts marked E and F. (2 mks)
ii. Is used to move the body tube over very small distances when observing under
high power magnification. (1 mk)
e)While trying to observe a specimen under a microscope, a student failed to see the
field of view. Suggest two possible causes of this. (2 mks)
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b)Name the parts labeled A to H. (5
mks)
27. Briefly and adequately explain how plants compensate for lack of movement in a constantly
changing environment. (2 marks)