Tamil Nadu Board 12th Standard Bio-Botany - Chapter 1: Book Back Answers and Solutions
This post covers the book back answers and solutions for Chapter 1 – Bio-Botany from the Tamil Nadu State Board 12th Standard Bio-Botany textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.
We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.
By going through this material, you’ll gain a strong understanding of Bio-Botany Chapter 1 along with the corresponding book back questions and answers (PDF format).
Question Types Covered:
- 1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following
- 2 Mark Questions: Answer briefly
- 3, 4, and 5 Mark Questions: Answer in detail
All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.
All the best, Class 12 students! Prepare well and aim for top scores. Thank you!
I. Multiple Choice Questions
a) Gametes are involved in asexual reproduction
b) Bacteria reproduce asexually by budding
c) Conidia formation is a method of sexual reproduction
d) Yeast reproduce by budding
Answer Key:
d) Yeast reproduce by budding
2. An eminent Indian embryologist is
a) S.R.Kashyap
b) P.Maheswari
c) M.S. Swaminathan
d) K.C.Mehta
Answer Key:
b) P.Maheswari
3. Identify the correctly matched pair
a) Tuber - Allium cepa
b) Sucker - Pistia
c) Rhizome - Musa
d) Stolon – Zingiber
Answer Key:
c) Rhizome - Musa
4. Size of pollen grain in Myosotis
a) 10 micrometer
b) 20 micrometer
c) 200 micrometer
d) 2000 micrometer
Answer Key:
a) 10 micrometer
5. First cell of male gametophyte in angiosperm is
a) Microscope
b) megaspore
c) Nucleus
d) Primary Endosperm Nucleus
Answer Key:
a) Microscope
6. Match the following
I) External fertilization i) pollen grain
II) Androecium ii)anther wall
III) Male gametophyte iii)algae
IV) Primary parietal layer iv)stamens
a)I-iv;II-i;III-ii;IV-iii
b)I-iii;II-iv;III-i;IV-ii
c)I-iii;II-iv;III-ii,IV-i
d)I-iii;II-i;III-iv;IV-ii
Answer Key:
b)I-iii;II-iv;III-i;IV-ii
7. Arrange the layers of anther wall from locus to periphery
a) Epidermis,middle layers, tapetum, endothecium
b) Tapetum, middle layers, epidermis, endothecium
c) Endothecium, epidermis, middle layers, tapetum
d) Tapetum, middle layers endothecium epidermis
Answer Key:
d) Tapetum, middle layers endothecium epidermis
8. Identify the incorrect pair
a) sporopollenin - exine of pollen grain
b) tapetum – nutritive tissue for developing microspores
c) Nucellus – nutritive tissue for developing embryo
d) obturator – directs the pollen tube into micropyle
Answer Key:
9. Assertion : Sporopollenin preserves pollen in fossil deposits
Reason : Sporopollenin is resistant to physical and biological decomposition
a) assertion is true; reason is false
b) assertion is false; reason is true
c) Both Assertion and reason are not true
d) Both Assertion and reason are true.
Answer Key:
d) Both Assertion and reason are true.
10. Choose the correct statement(s) about tenuinucellate ovule
a) Sporogenous cell is hypodermal
b) Ovules have fairly large nucellus
c) sporogenous cell is epidermal
d) ovules have single layer of nucellus tissue
Answer Key:
a) Sporogenous cell is hypodermal
11. Which of the following represent megagametophyte
a) Ovule
b)Embryo sac
c)Nucellus
d)Endosperm
Answer Key:
12. In Haplopappus gracilis, number of chromosomes in cells of nucellus is 4. What will be the chromosome number in Primary endosperm cell?
a) 8
b) 12
c) 6
d) 2
Answer Key:
c) 6
13. Transmitting tissue is found in
a) Micropylar region of ovule
b) Pollen tube wall
c) Stylar region of gynoecium
d) Integument
Answer Key:
c) Stylar region of gynoecium
14. The scar left by funiculus in the seed is
a) tegmen
b) radicle
c) epicotyl
d) hilum
Answer Key:
d) hilum
15. A Plant called X possesses small flower with reduced perianth and versatile anther. The probable agent for pollination would be
a) water
b) air
c) butterflies
d) beetles
Answer Key:
b) air
16. Consider the following statement(s)
i) In Protandrous flowers pistil matures earlier
ii) In Protogynous flowers pistil matures earlier
iii) Herkogamy is noticed in unisexual flowers
iv) Distyly is present in Primula
a) i and ii are correct
b) ii and iv are correct
c) ii and iii are correct
d) i and iv are correct
17. Coelorhiza is found in
a)Paddy
b)Bean
c)Pea
d)Tridax
Answer Key:
a)Paddy
18. Parthenocarpic fruits lack
a)Endocarp
b)Epicarp
c)Mesocarp
d) seed
Answer Key:
d) seed
19. In majority of plants pollen is liberated at
a) 1 celled stage
b) 2 celled stage
c) 3 celled stage
d) 4 celled stage
Answer Key:
II. Short Answer Questions
12th bio botanyIII. Long Answer Questions
12th bio botanyIV. Exercise
12thbio botany
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