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Botany
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TN State Board
TN 12th Standard
Botany
TEST : 18
TN State Board
TN 12th Standard
Botany
Chapter 1: Asexual and Sexual Reproduction in Plants
Prepare / Learn
Q1.
The correct order of haploid, diploid and triploid structure in fertilized embryo sac is
A.
synergid, zygote and PEN
B.
synergid, antipodal and polar nuclei
C.
antipodal, synergid and PEN
D.
synergid, polar nuclei and zygote
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Answer :
Option A
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
UNIT VI: Reproduction in Plants
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Q2.
Wind pollinated flowers are
A.
Small, producing nectar and dry pollen
B.
small, brightly colored, producing large number of pollen grains
C.
small, producing large number of pollen grains
D.
large, producing abundant nectar and pollen
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Answer :
Option C
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 2: Classical Genetics
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Q3.
In his classic experiments on Pea plants, Mendel did not use
A.
Flowering position
B.
Seed colour
C.
Pod length
D.
Seed shape
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Answer :
Option C
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
UNIT VII: Genetics
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Q4.
Pure line breed refers to
A.
Heterozygosity only
B.
Heterozygosity and linkage
C.
Homozygosity only
D.
Homozygosity and self assortment
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Answer :
Option C
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 3: Chromosomal Basis of Inheritance
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Q5.
How many map units separate two alleles A and B if the recombination frequency is 0.09?
A.
900 cM
B.
90 cM
C.
9 cM
D.
0.9 cM
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Answer :
Option C
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 4: Principles and Processes of Biotechnology
Prepare / Learn
Q6.
Which one of the following is not correct statement.
A.
Ti plasmid causes the bunchy top disease
B.
Multiple cloning site is known as Polylinker
C.
Non viral method transfection of Nucleic acid in cell
D.
Polylactic acid is a kind of biodegradable and bioactive thermoplastic.
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Answer :
Option A
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
UNIT VIII: Biotechnology
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Q7.
Genetic Engineering is
A.
Making artificial genes
B.
Hybridisation of DNA of one organism to that of the others
C.
Production of alcohol by using microorganisms
D.
Making artificial limbs, diagnostic instruments such as ECG, EFG, etc.
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Answer :
Option B
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 6: Principles of Ecology
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Q8.
Identify the A, B, C and D in the given table
A.
A-(+), B-Parasitism, C- (-), D- Amensalism
B.
A- (-), B-Mutalism, C- (+), D- Competition
C.
A- (+), B-Competition, C- (0) , D- Mutalism
D.
A- (0) , B-Amensalism, C- (+), D- Parasitism
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Answer :
Option A
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 7: Ecosystem
Prepare / Learn
Q9.
Which of the following is not a sedimentary cycle
A.
Nitrogen cycle
B.
Phosphorous cycle
C.
Sulphur cycle
D.
Calcium cycle
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Answer :
Option A
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
UNIT IX: Plant Ecology
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Q10.
Which ecosystem has the maximum biomass?
A.
Grassland ecosystem
B.
Pond ecosystem
C.
Lake ecosystem
D.
Forest ecosystem
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Answer :
Option D
Explaination / Solution:
No Explaination.
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TN State Board
TN 12th Standard
Botany
TEST : 18
Botany
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UNIT VI: Reproduction in Plants
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UNIT VII: Genetics
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UNIT VIII: Biotechnology
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UNIT IX: Plant Ecology
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UNIT X: Economic Botany
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Chapter 1: Asexual and Sexual Reproduction in Plants
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Chapter 2: Classical Genetics
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Chapter 3: Chromosomal Basis of Inheritance
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Chapter 4: Principles and Processes of Biotechnology
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Chapter 5: Plant Tissue Culture
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Chapter 6: Principles of Ecology
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Chapter 7: Ecosystem
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Chapter 8: Environmental Issues
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Chapter 9: Plant Breeding
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Chapter 10: Economically Useful Plants and Entrepreneurial Botany
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