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12th Bio Botany Assignment 2021 with Answerkey (TNSCERT ) English Medium

12th Bio Botany 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 Bio Botany English medium Assignment

12th Bio Botany Assignment 2021 with Answerkey
Assignment
Class:12 Subject: BIO-BOTANY
UNIT -1 PART – A
I. Multiple Choice Questions
1.Size of the pollen grain in mytosis
a) 10 micrometer b) 20 micrometer
c) 200 micrometer d) 2000 micrometer
   
2.Which of the following represent Megagametophyte
a) Ovule b) Embryo sac
c) Nucelleus d) Endosperm
   
3.Coelorhiza is found in_____________
a) Paddy b)Bean
c) Pea d) Tridax
   
4.Choose the correct statement(s) about tenuinucellate ovule.
a) Sporogenous cell is hypodermal b) Ovules have family large nucellus
c) Sporogenous cell is epidermal d) Ovules have single layer of nucellus tissue
   
5.An eminent Indian embryologist is _________________
a) S.R.Kashyap b) P Maheswari
c) M.S.Swaminathan d) K.C.Mehta
   
6.Parthenocarpic fruits lack
a) Endocarp b) Epicarp
c)Mesocarp d) Seed
   
7.Which of the following plant pollinium is seen
a) Hibiscus b) Datura
c) Calotropics d)Ricinus
   
8.In which types of ovules horse-shoe shaped nucellus is seen
a) Amphitropous b) Campytropous
c)Anthropous d) Orthoporous
   
9.Pollination by birds is called_____________
   
c)Embryogenesis d) Organogenesis
   
10._______________is used in Cryopreservation technique
a) Liguid mercury b) Liguid Helium
c) Liguid CO2 d) Liguid Nitrogen
   

PART – B

II. Very Short Answer.

1. What is sexual reproduction ?
   
2. Define the term diplospory?
   
3. What is pollinium ?
   
4. What is stomium ?
   
5. What is sporopollenin?
   
PART – C
III. Short Answer
1. List any two strategy adopted by bisexual flowers to prevent self pollination .
   
2. ”The endosperm of angiosperm is different form gymnosperm”.Do u agree.Justify your answer.
   
3. ” Enthoecium is associated with disiscence of another “ Justify the statement.
   
4. Pollination in Gymnosperms is different from Angiosperms”-Give reasons
   
5. Dicot and Monocot difference(any 3 points)
   
PART – D
IV. Write in detail.
1. Give a detailed account on parthenography add a note on its significance
   
2. What is endosperm, Explain the types
   

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