12th Zoology Assignment EM:- Hello Students recently Tamilnadu school department seek assignments from the school students, So we shared the assignment paper in pdf and we also provide an answer key for all subjects all class assignments in pdf
பனிரெண்டாம் வகுப்பு ஒப்படைப்பு 2021 உங்களுக்காக விடையுடன் கொடுக்க பட்டுள்ளது ,மிக நேர்த்தியாக வடிவமைக்க பட்ட இந்த விடை குறிப்புகளை நீங்கள் கீழே உள்ள PDF லிங்க்கை கிளிக் செய்வதன் மூலம் டவுன்லோட் செய்து கொள்ளலாம்
இந்த விடை குறிப்பில் உள்ள தவறுகளை சுட்டிக்காட்ட விரும்பினால் கேளே குறிப்பிடவும் ,உடனுக்குடன் தவறான விடையை மற்றயமைக்க படும்
Click Here to Download 12th Zoology English medium Assignment
| Assignment Class:12 Subject: Zoology Unit 1 |
|
| PART – A | I.Multiple Choice Questions |
| 1.Which type of Reproduction shows variation? | |
| a)Asexual Reproduction | b)Parthenogenesis |
| c)Sexual Reproduction | d)a and b both |
| Answer | c)Sexual Reproduction |
| 2.Which type of reproduction occurs in Bacteria? | |
| a)Gamete formation | b)Formation of endospores |
| c)Conjugation | d)Formation of Zoospores |
| Answer | c)Conjugation |
| 3.Which type of parthenogenesis produces only female organism? | |
| a)Arrhenotoky | b)Thelytoky |
| c)Amphitoky | d)both a and b |
| Answer | a)Arrhenotoky |
| 4.Which of the following organisms exhibits both sexual and asexual reproduction? | |
| a)Amoeba | b)Euglena |
| c)Paramecium | d)Bacteria |
| Answer | |
| 5.External fertilization takes place in ________ | |
| a)Birds | b)Reptiles |
| c)Sponges | d)Mammals |
| Answer | |
| 6.Which type of reproduction takes place in honey bees | |
| a)Asexual and sexual reproduction | b)Sexual reproduction &parthenogenesis |
| c)Asexual and Parthogenesis | d)All the above |
| Answer | |
| 7. The fusion of morphological and physiological identical gametes is called as | |
| a) Merogamy | b) Anisogamy |
| c) Isogamy | d) Conjugation |
| Answer | |
| 8. Conjugation occurs in | |
| a) Vorticella | b) Amoeba |
| c) Reptiles | d) Actinosphareum |
| Answer | |
| 9. In honey bees, the unfertilised eggs produce | |
| a) Queen bee | b) Worker bee |
| c) Drone bee | d) Drone bee and worker bee |
| Answer | |
| 10. Which of the following are known as seasonal breeders? | |
| a) Frogs | b) Honey bee |
| c) Rabbits | d) Birds |
| Answer | |
|
PART – B II.Very Short Answer. |
|
| 1. What is Asexual Reproduction? | |
| 2. Which type of reproduction is effective – Asexual or Sexual and why? | |
| 3. What is Autogamy? Give examples | |
| 4. Mention the type of reproduction occurs in Ciliates. | |
| 5. What is meant by Arrhenotoky? | |
|
PART – C II. Short Answer. |
|
| 1. What are seasonal breeders? Give examples. | |
| 2. What is Artificial Parthenogenesis? | |
| 3. Define hologamy. | |
| 4. Differentiate External Fertilization and Internal Fertilization | |
| 5. What is Amphitoky? | |
|
PART – D IV.Write in detail. |
|
| 1. What is meant by Natural Parthenogenesis? Describe its types. | |
| 2. Differentiate Oviparous and Viviparous condition. | |
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