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Published on: 30/08/2022
QB365 provides a detailed and simple solution for every Possible Creative Questions in Class 12 Biology Subject - Botany - Plant Breeding, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.
Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
The term green revolution was coined by ___________
William S Gaud
M.S. Swaminathan
Dr. B.P. Pal
Dr. N.E. Borla
2.
Superiority of hybrids over parents only in vegetative growth not in yield. This phenomenon is termed as ________
Euheterosis
Balanced euheterosis
Luxuriance
Mutational heterosis
3.
Intraspecific hybridization is also termed as __________
Intravarietal hybridization
Intervarietal hybridization
Interspecific hybridization
Intergeneric hybridization
4.
Identify the proper sequence of hybridisation technique
Emasculation ⟶ Selection ⟶ Bagging ⟶ Crossing ⟶ Harvesting
Harvesting ⟶ Selection ⟶ Crossing ⟶ Emasculation ⟶ Bagging
Selection ⟶ Harvesting ⟶ Crossing ⟶ Emasculation ⟶ Bagging
Selection ⟶ Emasculation ⟶ Bagging ⟶ Crossing ⟶ Harvesting
5.
Statement (1): Clonal selection is carried out in asexually propagating plants.
Statement (2): Clones show similar genotypes.
Statement 1 is correct and Statement 2 is incorrect
Statement 1 is incorrect and Statement 2 is correct
Both the statements are correct
Both the statements are incorrect
6.
Statement (1): Trichoderma species is a free-living bacteria.
Statement (2): It acts as a potent bio-control agent
Statement 1 is correct and Statement 4 is incorrect
Statement 1 is incorrect and Statement 2 is correct
Both the statements are correct
Both the statements are incorrect
7.
Assertion (A): Hybrids show increased growth and elevated yield.
Reason (R): F1 hybrids show Heterosis.
Both A and R are true. R explains A.
A is true R is false
A is false R is true
Both A and R are false
8.
Assertion (A): Pure line varieties show homozygosity.
Reason (R): Pure line species are obtained through cross-pollination.
Both A and R are true. R explains A.
A is true R is false
A is false R is true
Both A and R are false
9.
Assertion (A): SLF promotes vigorous growth and provide resistance against diseases.
Reason (R): SLF is made from kelp containing more than 70 minerals.
Both A and R are true. R explains A.
A is true R is false
A is false R is true.
Both A and R are false
10.
Azolla is best suited biofertilizer for _________
Sugar cane cultivation
Paddy cultivation
Wheat cultivation
Cotton cultivation
11.
Arbuscular mycorrhizae is a symbiotic association between ____________
Algae and fungi
Angiosperm roots and fungi
Blue-green algae and Azolla fern
Cyanobacteria and coralloid root
12.
Which is not a free-living nitrogen-fixing species?
Azotobacter
Clostridium
Nostoc
Anabaena
13.
Identify the incorrect statement:
Bio-inoculants are efficient in solubilising phosphate
Bio-inoculants are ecofriendly organic agro outputs
Bio-inoculants are obtained from dead organic matters
Bio-inoculants are designed to improve soil fertility
14.
Which of the following scientist developed world's first cotton hybrid?
Dr. B.P. Pal
C.T. Patel
Dr. K. Ramiah
N.G.P. Rao
15.
________is the process of bringing a plant species under human control.
Emasculation
Hybridization
Domestication
Acclimatization
1.
(a)
William S Gaud
2.
(c)
Luxuriance
3.
(b)
Intervarietal hybridization
4.
(d)
Selection ⟶ Emasculation ⟶ Bagging ⟶ Crossing ⟶ Harvesting
5.
(c)
Both the statements are correct
6.
(b)
Statement 1 is incorrect and Statement 2 is correct
7.
(a)
Both A and R are true. R explains A.
8.
(b)
A is true R is false
9.
(a)
Both A and R are true. R explains A.
10.
(b)
Paddy cultivation
11.
(b)
Angiosperm roots and fungi
12.
(d)
Anabaena
13.
(c)
Bio-inoculants are obtained from dead organic matters
14.
(b)
C.T. Patel
15.
(c)
Domestication
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