56. The most stable ecosystem is –

A. Forest

B. Steppe

C. Sea

D. Desert

View Answer/Explanation

Correct Answer is C

57. From where oxygen is made available for photosynthesis to plants?

A. Air

B. Water

C. Soil

D. Sunlight

View Answer/Explanation

Correct Answer is B

58. Which one of the following produces seeds but not flowers?

A. Pine

B. Cashew Nuts

C. Coffee

D. Groundnut

View Answer/Explanation

Correct Answer is C

59. The word Histology was firstly used by –

A. Shelden

B. Robert Hooke

C. Mayer

D. T. H. Maman

View Answer/Explanation

Correct Answer is C

60. Which of the following vitamins are used as a hormone?

A. Vitamin A

B. Vitamin B

C. Vitamin C

D. Vitamin D

View Answer/Explanation

Correct Answer is D

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