11th Standard Syllabus & Materials

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TN 11th Tamil இயற்கை வேளாண்மை,சுற்றுச்சூழல் -செய்யுள் - மனோன்மணீயம் Important Questions And Answers Study Material - QB365 Set A

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TN 11th Tamil என்னுயிர் என்பேன் -துணைப்பாடம் - இசைத்தமிழர் இருவர் Important Questions And Answers Study Material - QB365 Set A

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TN 11th Tamil மொழி கலை -செய்யுள் - ஒவ்வொரு புல்லையும் Important Questions And Answers Study Material - QB365 Set A

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TN 11th Tamil பீடு பெற நில் - இலக்கணம் - பகுபத உறுப்புகள் Important Questions And Answers Study Material - QB365 Set A

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TN 11th Tamil பீடு பெற நில் - துணைப்பாடம் - வாடிவாசல் Important Questions And Answers Study Material - QB365 Set A

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TN 11th Tamil பீடு பெற நில் - செய்யுள் - குறுந்தொகை Important Questions And Answers Study Material - QB365 Set A

11th Standard English Medium Biology (Zoology) Subject Trends in Economic Zoology Book Back 2 Mark Questions with Solution Part - II

Published on: 08/06/2021

QB365 provides detailed and simple solution for every book back questions in class 11 Biology subject.It will helps to get more idea about question pattern in every book back questions with solution.

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Std: 11th Standard - Biology

chapter: - Book back Questions

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Questions:

Generic 2

4 x 2 = 8

Write the peculiar characters of duck.

What are the advantages of artificial insemination?

Define cross breeding.

What happens to the drones after mating flight?

Generic 3

1 x 3 = 3

Mention the advantages of MOET.

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Answers Key:

Generic 2

4 x 2 = 8

Peculiarity characters of ducks:
1. The body is fully covered with oily feathers.
2. They have a layer of fat under their skin which prevents it from getting wet.
3. They lay eggs at night or in the morning.
4. The ducks feed on rice bran, kitchen wastes, waste fishes and snails.

Advantages of artificial insemination are:
1. It increases the rate of conception.
2. It avoids genital diseases.
3. Semen can be collected from injured bulls which have desirable traits.
4. Superior animals located apart can be bred successfully.

Cross breeding:
1. It is a special method of animal breeding.
2. Breeding between a superior male of one breed with a superior female of another breed.
3. The cross breed progeny has superior traits.

(i) The drone is the functional male member of the colony.
(ii) The sole duty of the drone is to fertilize the virgin Queen hence called "King of the Colony"
(iii) During swarming the process of leaving the colony by the Queen with a large group of worker bees to form a new colony the drones follows the Queen, copulates and dies after copulation.

Generic 3

1 x 3 = 3

MOET-Multiple Ovulation embryo transfer technology:
1. Advantage of this technology is to produce high milk yielding females and high-quality meat yielding bulls in a short time.
2. It is applicable in animal husbandry.
3. It is a method of propagation of animals with desirable traits.
4. This method can be applied when the success rate of cross over even in low cost.