Practice MCQ Questions and answers on Biology-GK

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51.
Which of the following bacterium causes crown gall disease in plants?

A. Bacillus thurigiensis

B. Agrobacterium tumefaciens

C. Pseudomonas fluorescens

D. None of these

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52.
Fossils of blue green algae were found in lime stones with the age almost as old as

A. 1.3 Billion years

B. 2.3 Billion years

C. 3.3 Billion years

D. 4.3 Billion years

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53.
They have also proved extremely useful in our quest of knowledge of outer space.

A. Bacteria

B. Fungi

C. Yeasts

D. None of the above

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54.
Chemicals like ________ may be added to different foods or fruits to prevent or retard the growth microorganisms.

A. Potasium

B. Calcium

C. Potassium metabisulphite

D. Sulphur

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55.
Eutrophication is the result of

A. Bryophytes

B. Algae and aquatic plants

C. Gymnosperm

D. Pteridophytes

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Practice MCQ Questions and answers on Biology-GK

51. Which of the following bacterium causes crown gall disease in plants?

Answer & Solution

52. Fossils of blue green algae were found in lime stones with the age almost as old as

Answer & Solution

53. They have also proved extremely useful in our quest of knowledge of outer space.

Answer & Solution

54. Chemicals like ________ may be added to different foods or fruits to prevent or retard the growth microorganisms.

Answer & Solution

55. Eutrophication is the result of

Answer & Solution

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51.
Which of the following bacterium causes crown gall disease in plants?

52.
Fossils of blue green algae were found in lime stones with the age almost as old as

53.
They have also proved extremely useful in our quest of knowledge of outer space.

54.
Chemicals like ________ may be added to different foods or fruits to prevent or retard the growth microorganisms.

55.
Eutrophication is the result of