Q1
mcq
Pedogenesis refers to :
- A. Population
- B. Fossils
- C. Soil
- D. Water
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Q3
mcq
A specific place in an ecosystem where an organism lives and performs its function is :
- A. landscape
- B. habitat
- C. biome
- D. niche
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Q4
mcq
The genotype of a plant showing the dominant phenotype can be determined by :
- A. Dihybrid cross
- B. Back cross
- C. Pedigree analysis
- D. Test cross
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Q5
mcq
Mendel in his classic experiments on pea plants, did not use :
- A. Pod length
- B. Flowering position
- C. Seed shape
- D. Seed colour
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Q6
mcq
Tephrosia purpurea is a :
- A. Bio-fertilizer
- B. Bio-pesticide
- C. Bio-herbicide
- D. Green manure
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Q7
mcq
IUCN red list categories has developed criteria for threatened species. This criteria ‘C’ refers to :
- A. Small population size and decline
- B. Geographic range
- C. Population reduction
- D. Quantitative analysis
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Q8
mcq
DNA element with ability to change position is called __________.
- A. Intron
- B. Cistron
- C. Recon
- D. Transposon
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Q9
mcq
Assertion (A) : Turmeric fights various kinds of cancer.
Reason (R) : Curcumin is an anti-oxidant present in turmeric.
- A. Both (A) and (R) are wrong.
- B. Both (A) and (R) are correct but (R) does not explain (A).
- C. (A) is correct but (R) is wrong.
- D. Both (A) and (R) are correct and (R) explains (A).
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Q10
mcq
__________ is an example for micronutrient Bio-fertilizer.
- A. Amanita
- B. Aspergillus
- C. Clostridium
- D. Bacillus
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Q11
mcq
Solar energy used by green plants for photosynthesis is only :
- A. 3 - 10%
- B. 2 - 8%
- C. 2 - 9%
- D. 2 - 10%
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Q12
mcq
Disease resistant plants are produced by :
- A. Protoplast culture
- B. Organ culture
- C. Cell suspension culture
- D. Meristem culture
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Q13
mcq
Which of the following is not a sedimentary cycle ?
- A. Sulphur cycle
- B. Nitrogen cycle
- C. Calcium cycle
- D. Phosphorous cycle
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Q14
mcq
The size of pollen grain in Myosotis :
- A. 200 micrometer
- B. 10 micrometer
- C. 2000 micrometer
- D. 20 micrometer
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Q15
mcq
In which technique Ethidium Bromide is used ?
- A. Polymerase Chain reaction
- B. Southern Blotting technique
- C. Agrose Gel Electrophoresis
- D. Western Blotting technique
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Q16
short answer
2 marks
Differentiate secretory and invasive tapetum.
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Q18
short answer
2 marks
Give the names of the scientists who rediscovered Mendelism.
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Q22
short answer
2 marks
What is thermal stratification ? Mention its types.
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Q23
short answer
2 marks
Pyramid of energy is always upright. Give reasons.
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Q24
short answer
2 marks
Mention the human activities that lead to produce greenhouse effect.
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Q25
short answer
3 marks
Name the seven contrasting traits of Mendel.
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Q26
short answer
3 marks
Draw and label the T.S. of mature anther.
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Q28
short answer
3 marks
What are the materials used to grow microorganism like Spirulina ?
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Q29
short answer
3 marks
Productivity of profundal zone will be low. Why ?
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Q30
short answer
3 marks
Distinguish between endangered and vulnerable species.
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Q31
short answer
3 marks
Write down the objectives of plant breeding.
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Q32
short answer
3 marks
What is ecological hierarchy ? Name the levels of ecological hierarchy.
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Q33
short answer
3 marks
What are somaclonal and gametoclonal variations ?
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Q34
long answer
5 marks
(a)Define Parthenocarpy. Write a note on its significance.
OR
(b)Enumerate the anatomical adaptations of xerophytes.
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Q35
long answer
5 marks
(a)Describe the dominant epistasis with an example.
OR
(b)Draw a Pyramid from following details and explain in brief.
Quantities of organisms are given : Hawks-50, Plants-1000, Rabbit and Mouse-250+250, Pythons and Lizard-100+50 respectively.
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Q36
long answer
5 marks
(a)What is gene mapping ? Write its uses.
OR
(b)What are the effects of deforestation ?
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Q37
long answer
5 marks
(a)What is bioremediation ? Give some examples of bioremediation.
OR
(b)Explain Green manuring.
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Q38
long answer
5 marks
(a)Give an account on Cryopreservation.
OR
(b)Give an account of active principle and medicinal value of Nilavembu, Keezhanelli and Adathodai plants.
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Q39
long answer
(a) Define Parthenocarpy. Write a note on its significance.
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Q40
long answer
(b) Enumerate the anatomical adaptations of xerophytes.
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Q41
long answer
(a) Describe the dominant epistasis with an example.
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Q42
long answer
(a) What is gene mapping ? Write its uses.
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Q43
long answer
(b) What are the effects of deforestation ?
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Q44
long answer
(a) What is bioremediation ? Give some examples of bioremediation.
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Q47
long answer
(b) Give an account of active principle and medicinal value of Nilavembu, Keezhanelli and Adathodai plants.
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