Friday, July 4, 2014

9th Biology CBSE Guess paper for SA-1

1.State the  reason  of  introducing  Italian  bee  variety  in  bee  farms.
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2. State one demerit with composite fish culture system.
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3. State one importance of photo period in agriculture.  
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4. Name one micronutrient and one macronutrient which plants take from the soil.
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6.What  is meant by  the term   green  manure  ?   State its role in agriculture.
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7.State two  functions  of Vacuoles  in a  plant  cell.
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8.List two  characteristics  of  cork  cells which  help  them  to  function as  protective  tissue ?
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9. What  is  composite  fish  culture  system  ?    State  one  merit  and  one  demerit  of  such  a system
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10. Name the energy currency of the cell. Which cell organelle releases this currency?
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11. List any two methods adopted in farming for the health of the cattle.
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12. List the two types of food requirements of dairy animals.
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13. List two similarities between Mitochondria and Plastids. 2
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14. Name the connective tissue which helps in repair of tissues. State where this tissue is found.
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15. What is manure?  How is it prepared? State its role in changing the quality of soil of a field having excess of: (i) Sand (ii) Clay.
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16. Make a table to show the difference between Striated, Unstriated and Cardiac Muscles on  the  basis of their  structure  and location in the body.
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17. Distinguish between intercropping and mixed cropping.   List any two advantages of intercropping over mixed cropping.
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18. State three management practices that are common in dairy and poultry farming.
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19. Name the tissue responsible for flexibility in plants?   How would you differentiate it from other permanent tissues?
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20. List any three desirable characters of bee varieties suitable for honey production?
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21. List any three ways by which the insect pests attack the plants.
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Ans: Insect pests destroy crops by the following ways:

Sucking the cellular sap from various plant parts

Cutting the roots, stem, and leaves of plants

Boring into stems and fruits

22. What is a connective tissue? State it’s any two basic components. Differentiate between Ligament and Tendon.
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23. (a) What are  Lysosomes ?   Why are they called suicide bags of  a cell   ?   

(b) What  happens  to  the  dry  raisins  when  we  put  them  in  plain  water  for  some time  ?  State the reason  for  whatever  is  observed.    What  would  happen  if  these raisins  are  not placed in  concentrated  salt  solution  ?
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24. (a) What is endoplasmic reticulum  ? 
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(b) Describe its structure.

(c) Name the two types of endoplasmic reticulum.

(d) What crucial role does it play in the liver cells of vertebrates?

(e) What is membrane biogenesis?

25. (a) What is a cell ?  Why is a cell called the structural and function unit of life ?
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(b) Why is the plasma membrane called a selectivity permeable membrane ?

IX CBSE Solved Science Practice papers SA-1
Practice papers
Answer
Answer

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