Home
Class 12
BIOLOGY
a) Name the tropical sugar cane variety ...

a) Name the tropical sugar cane variety grown in South India. How has it helped in improving the sugar cane qality grown in North India?
b) Identify 'a', 'b' and 'c' in the following table:

Text Solution

Verified by Experts

i) The tropical sugarcane variety grown in Sourthern India is Saccharum officinarum which has a thicker stem and high sugar content, however, it could grow in Northern India Saccharum barberi is natively grown in Northen India.
These two varieties were crossed to get the desirable qualities of both (higher sugar content, thicker stem and the ability to grow in Northern India).
ii) a) Aphids
b) Jassids and fruit borer
c) Okra (Bhindi)
Promotional Banner

Topper's Solved these Questions

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise Section D|13 Videos
  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SET -I Section -A|8 Videos
  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise Section B|43 Videos
  • SAMPLE PAPER 2019

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise Section E Part B|3 Videos

Similar Questions

Explore conceptually related problems

Which tropical canes grown in south india had thicker stems and high sugar content but did not grow well in north India.

Which species of sugarcane was originally grown in North India, but had poor sugar content and yield?

Write the scientific names of sugarcane grown in north india and south India respectively . Mention their characterstics.

Plant breeding technique has helped sugar industry in North india Explain how.

Given below is the diagram of a human ovum surrounded by a few sperms. Study the diagram and answer the following questions : (a) Which one of the sperms would reach the ovum earlier ? (b) Identify 'D' and 'E'. Mention the role of 'E'. (c ) Mention what helps the entry of sperm into the ovum and write the changes occuring in the ovum during the process. (d) Name the specific region in the female reproductive system where the event represented in the diagram takes place.

Which of the following are the species that are crossed to give sugarcane varieties with high sugar, high yeild, thick stems and ability to grow in the sugarcane belt of North India ?

By the term velocity of rain, we mean velocity with which raindrops fall relative to the ground. In absence of wind, raindrops fall vertically and in presence of wind raindrops fall obliqucly. Moreover raindrops acquire a constant terminal velocity due air resistance very quickly as they fall toward the carth. A moving man relative to himself observes an altered velocity of raindrops. Which is known as velocity of rain relative to the man. It is given by the following equation. vec(v)_(rm)=vec(v)_(r)-vec(v)_(m) A standstill man relative to himself observes rain falling with velocity, which is equal to velocity of the raindrops relative to the ground. To protect himself a man should his umbrella against velocity of raindrops relative to himself as shown in the following figure. Rain is falling vertically with velocity 80 cm/s. (a) How should you hold your umbrella ? (b) You start walking towards the east with velocity 60 cm/s. How should you hold umbrella ? (c) You are walking towards the west with velocity 60 cm/s. How should you hold your umbrella ? (d) You are walking towards the north with velocity 60 cm/s. How should you hold your umbrella? (e) You are walking towards the south with velocity 80 cm/s. How should you hold your umbrella ?

(a) What is plant breeding? List the two steps the classical plant breeding involves. (b) How has the mutation breeding helped in improving crop varieties? Give one example where this technique has helped. (c) How has the breeding programme helped in improving the public nutritional health? State two examples in support of your answer.

XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-Section C
  1. (a) Draw an L.S. of pistil showing pollen tube entering into the embry...

    Text Solution

    |

  2. Name the kind of diseases/disorders and any two symptoms that are like...

    Text Solution

    |

  3. Name the technique and the property of plant cells that can help to gr...

    Text Solution

    |

  4. Give reasons why : (a) DNA cannot pass into a host cell through the...

    Text Solution

    |

  5. State the medicinal value and the bioactive molecules produced Penicil...

    Text Solution

    |

  6. Explain the steps in the formation of an ovum from an oogonium in huma...

    Text Solution

    |

  7. a) Explain "birth rate" in a population by taking a suitable example. ...

    Text Solution

    |

  8. a) Explain DNA polymorphism as the basis of genetic mapping of human g...

    Text Solution

    |

  9. a) Explain "death rate" in a population by taking a suitable example. ...

    Text Solution

    |

  10. Explain any three advantages the seeds offer to angiosperms.

    Text Solution

    |

  11. Name and explain the role of inner and middle walls of the human uteru...

    Text Solution

    |

  12. A color-blind child is born to a normal couple. Work out a cross to sh...

    Text Solution

    |

  13. Mendel published his work on inheritance of characters in 1865, but is...

    Text Solution

    |

  14. Women are often blamed for producing female children. Consequently, th...

    Text Solution

    |

  15. a) Name the tropical sugar cane variety grown in South India. How has ...

    Text Solution

    |

  16. Why are beehives kept in crop field during flowering period? Name any ...

    Text Solution

    |

  17. Study the graph given below and answer the questions that follow: ...

    Text Solution

    |

  18. i) What is primary productivity? Why does it vary in different types o...

    Text Solution

    |

  19. A cross between a normal couple resulted in a son who was haemophilic ...

    Text Solution

    |