Long Answer TypeThe diagram below shows the human circulatory system. Answer the following questions:
i) Name the blood vessels 1, 3, 6 and 7.
(ii) Name the blood vessel supplying blood to the walls of the heart with oxygen.
(iii) Draw a neat labeled diagram of blood vessel '2' as seen in a cross-section.
(iv)Mention one structural difference between blood vessels numbered 4 and 5.
(a)The diagram below shows two reproductive cells A and B. Answer the following
questions based on the diagram:
(i) Name the reproductive cells A and B.
(ii) Where are the above cells produced in the reproductive system?
(iii) Where do these cells unite in the female reproductive system?
(iv)Name the main hormones secreted by (1) ovary (2) testes.
The diagram shows a layer of epidermal cells showing a fully grown root hair. Answer the questions by seeing the diagram:
(i) Name the parts labelled A. B, C and D.
(ii) The root hair cell is in a turgid state. Name and explain the process which caused
this state.
(iii) Mention one distinct difference between the parts labelled A and B.
(iv) Draw a diagram of the above root hair cell as it would appear when a concentrated
solution of fertilisers is added near it.
(i) The different parts are :
A- Cell wall
B-Cell membrane
C - Epidermal cell
D-Nucleus
ii) The process is osmosis which causes the cell to become turgid.
Osmosis Is the movement of water molecules from a region of their high concentration to a region of their low concentration through a semi-permeable membrane.
(iii) Part A: Cell wall; Part B: Cell membrane
| Cell wall | Cell membrane |
| Freely permeable | Semi-permeable |
iv
. 
The diagram shows a stage during cell division. Study the diagram and answer the following questions:
(i) Name the parts labelled 1, 2 and 3.
(ii) Identify the stage shown here by giving one reason.
(iii) Where in the body does this type of cell division occur?
(iv) Name the stage prior to this stage and draw a diagram to represent the same.
Study the diagram given below and answer the following questions:
(i) Name the process being studied in the above experiment.
(ii) Explain the process mentioned in (i) above.
(iii) Why is oil placed over water?
(iv)What do we observe with regard to the level of water when this setup is placed in
(1) bright sunlight, (2) humid conditions and (3) on a windy day?
(v) Mention any three adaptations in plants to overcome the process mentioned in (ii)
Mention the effects of two individuals in a street fight on the following organs by the autonomous nervous system (one has been done for you).
| Organ | Sympathetic nervous system | Para-sympathetic nervous system |
| eg Lungs | Dilates bronchi and brochioles | contricts bronchi and bronchioles
|
| 1) Heart 2 Pupils of the eye 3 . Salivary |
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