Plus One / 12th Botany - Book Back Answers - Chapter 10 - English Medium
Tamil Nadu Board 12th Standard Botany - Chapter 10: Book Back Answers and Solutions
This post covers the book back answers and solutions for Chapter 10 – Botany from the Tamil Nadu State Board 12th Standard 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 Botany Chapter 10 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!
Unit 10 - Economically Useful Plants and Entrepreneurial Botany
I. Multiple Choice Questions
1. Consider the following statements and choose the right option.
i) Cereals are members of grass family.
ii) Most of the food grains come from monocotyledon.
a) (i) is correct and (ii) is wrong
b) Both (i) and (ii) are correct
c) (i) is wrong and (ii) is correct
d) Both (i) and (ii) are wrong
Answer Key:
b) Both (i) and (ii) are correct
2. Assertion: Vegetables are important part of healthy eating.
Reason: Vegetables are succulent structures of plants with pleasant aroma and flavours.
a) Assertion is correct, Reason is wrong
b) Assertion is wrong, Reason is correct
c) Both are correct and reason is the correct explanation for assertion.
d) Both are correct and reason is not the correct explanation for assertion.
Answer Key:
a) Assertion is correct, Reason is wrong
3. Groundnut is native of _____________
a) Philippines
b) India
c) North America
d) Brazil
Answer Key:
d) Brazil
4. Statement A: Coffee contains caffeine
Statement B: Drinking coffee enhances cancer
a) A is correct, B is wrong
b) A and B – Both are correct
c) A is wrong, B is correct
d) A and B – Both are wrong
Answer Key:
a) A is correct, B is wrong
i) Cereals are members of grass family.
ii) Most of the food grains come from monocotyledon.
a) (i) is correct and (ii) is wrong
b) Both (i) and (ii) are correct
c) (i) is wrong and (ii) is correct
d) Both (i) and (ii) are wrong
Answer Key:
b) Both (i) and (ii) are correct
2. Assertion: Vegetables are important part of healthy eating.
Reason: Vegetables are succulent structures of plants with pleasant aroma and flavours.
a) Assertion is correct, Reason is wrong
b) Assertion is wrong, Reason is correct
c) Both are correct and reason is the correct explanation for assertion.
d) Both are correct and reason is not the correct explanation for assertion.
Answer Key:
a) Assertion is correct, Reason is wrong
3. Groundnut is native of _____________
a) Philippines
b) India
c) North America
d) Brazil
Answer Key:
d) Brazil
4. Statement A: Coffee contains caffeine
Statement B: Drinking coffee enhances cancer
a) A is correct, B is wrong
b) A and B – Both are correct
c) A is wrong, B is correct
d) A and B – Both are wrong
Answer Key:
a) A is correct, B is wrong
5. This is an example of brush fibre yielding plant
a) Cyperus
a) Cyperus
b) Neem
c) Cotton
c) Cotton
d) Palm
Answer Key:
Answer Key:
d) Palm
6. Tectona grandis is coming under family
a) Lamiaceae
b) Fabaceae
c) Dipterocaipaceae
d) Ebenaceae
Answer Key:
a) Lamiaceae
7. Tamarindus indica is indigenous to
a) Tropical African region
b) South India, Sri Lanka
c) South America, Greece
d) India alone
Answer Key:
a) Tropical African region
8. New world species of cotton
a) Gossipium arboretum
b) G.herbaceum
c) Both a and b
d) G.barbadense
Answer Key:
d) G.barbadense
9. Assertion: Turmeric fights various kinds of cancer
Reason: Curcumin is an anti-oxidant present in turmeric
a) Assertion is correct, Reason is wrong
b) Assertion is wrong, Reason is correct
c) Both are correct
d) Both are wrong
Answer Key:
c) Both are correct
10. Find out the correctly matched pair.
a) Rubber Shorea robusta
b) Dye Lawsonia inermis
c) Timber Cyperus papyrus
d) Pulp Hevea brasiliensis
Answer Key:
b) Dye Lawsonia inermis
11. Find out the wrongly paired one
a) Burma teak Tectona grandis
b) Rosewood Dalbergia sp.
c) Ebony Diaspyros eberum
d) Henna Shorea robusta
a) Burma teak Tectona grandis
b) Rosewood Dalbergia sp.
c) Ebony Diaspyros eberum
d) Henna Shorea robusta
Answer Key:
d) Henna Shorea robusta
12. Observe the following statements and pick out the right option from the following:
Statement I – Perfumes are manufactured from essential oils.
Statement II – Essential oils are formed at different parts of the plants.
a) Statement I is correct
b) Statement II is correct
c) Both statements are correct
d) Both statements are wrong
Answer Key:
c) Both statements are correct
13. Observe the following statements and pick out the right option from the following:
Statement I: The drug sources of Siddha include plants, animal parts, ores and minerals.
Statement II: Minerals are used for preparing drugs with long shelf-life.
a) Statement I is correct
b) Statement II is correct
c) Both statements are correct
d) Both statements are wrong
Answer Key:
c) Both statements are correct
12. Observe the following statements and pick out the right option from the following:
Statement I – Perfumes are manufactured from essential oils.
Statement II – Essential oils are formed at different parts of the plants.
a) Statement I is correct
b) Statement II is correct
c) Both statements are correct
d) Both statements are wrong
Answer Key:
c) Both statements are correct
13. Observe the following statements and pick out the right option from the following:
Statement I: The drug sources of Siddha include plants, animal parts, ores and minerals.
Statement II: Minerals are used for preparing drugs with long shelf-life.
a) Statement I is correct
b) Statement II is correct
c) Both statements are correct
d) Both statements are wrong
Answer Key:
c) Both statements are correct
14. Select the mismatch.
a) Andrographis – hepato protective
b) Adhatada – broncho dialator
c) Phyllanthus – anti-diabetic
d) Curcumin – anti-oxidant
a) Andrographis – hepato protective
b) Adhatada – broncho dialator
c) Phyllanthus – anti-diabetic
d) Curcumin – anti-oxidant
Answer Key:
b) Adhatada – broncho dialator
15. The active principle trans-tetra hydro canabial is present in
a) Opium
b) Curcuma
c) Marijuana
d) Andrographis
Answer Key:
c) Marijuana
16. Which one of the following matches is correct?
a) Palmyra - Native of Brazil
b) Saccharum - Abundant in Kanyakumari
c) Steveocide - Natural sweetener
d) Palmyra sap - Fermented to give ethanol
Answer Key:
c) Steveocide - Natural sweetener
15. The active principle trans-tetra hydro canabial is present in
a) Opium
b) Curcuma
c) Marijuana
d) Andrographis
Answer Key:
c) Marijuana
16. Which one of the following matches is correct?
a) Palmyra - Native of Brazil
b) Saccharum - Abundant in Kanyakumari
c) Steveocide - Natural sweetener
d) Palmyra sap - Fermented to give ethanol
Answer Key:
c) Steveocide - Natural sweetener
17. The only cereal that has originated and domesticated from the New world.
a) Oryza sativa
a) Oryza sativa
b)Triticum asetumn
c) Triticum duram
c) Triticum duram
d) Zea mays
Answer Key:
d) Zea mays
18. Which of the following statement(s) is/are correct?
i. Mushrooms are the fruiting body of edible fungi.
ii. Single-cell proteins are the dried cells of macro organism.
iii. Regular use of liquid seaweed fertilizer will help plants to withstand environmental stress.
iv. SCP can completely replace the conventional protein sources.
A. (i) and (ii),
B. (i) and (iii),
C. (i) and (iv),
C. (i) and (iv),
D. (i) alone
Answer Key:
D. (i) alone
19. Select the incorrect pair/pairs of statements about single cell protein
i. Chemical pesticides - Safe for human and the environment
ii. Mushrooms - White vegetable
iii. Zarrouk medium- Culture medium
iv. Seaweed - Rich in potassium
A. (i) and (ii),
i. Chemical pesticides - Safe for human and the environment
ii. Mushrooms - White vegetable
iii. Zarrouk medium- Culture medium
iv. Seaweed - Rich in potassium
A. (i) and (ii),
B. (i) and (iv),
C. (i) and (iii),
C. (i) and (iii),
D. (i) alone
Answer Key:
A. (i) and (ii),
20. Match the following pairs about mushroom cultivation.
A. Straw size (i) 75-85%
B. Distant between blocks (ii) 20 cm
C. Cap size at harvesting (iii) 2-4 inch
D. Relative humidity (iv) 10-12 cm
A. A-(ii), B-(iii), C-(iv), D-(i)
B. A-(iii), B-(ii), C-(iv), D-(i)
C. A-(ii), B-(iii), C-(iv), D-(i)
D. A-(i), B-(ii), C-(iii), D-(iv)
Answer Key:
C. A-(ii), B-(iii), C-(iv), D-(i)
21. Assertion: In Spirulina culture, half of the required nutrie nts added first and the rest in later.
Reason: If all the nutrients are added first, it will affect the culture growth.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) Both A and R are false.
Answer Key:
(a) Both A and R are true and R is the correct explanation of A.
II. Short Answer Questions
12th bio botanyIII. Long Answer Questions
12th bio botanyIV. Exercise
12thbio botany
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