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61
The spring wood and the summer wood which form a cylindrical layer of secondary xylem during one season's growth constitute a/an
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Answer: Option A
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62
The first link in the food chain is the
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Answer: Option A
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63
Which of the following elements is obtained from the sea algae?
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Answer: Option D
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64
The Arteether medicine which is used to cure malaria is obtained from a
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Answer: Option A
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65
The part of root involved in water absorption is zone of
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Answer: Option C
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66
Which of the following antibiotics blocks protein synthesis by acting as an analogue to the adenosine terminal of phenylalanyl tRNA, and thus displacing aminoacyl tRNA?
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Answer: Option D
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67
In Phlox, the vascular cylinder is continuous and consists of a single layered pericycle, a complete ring of phloem, a complete ring of cambium and a complete cylinder of xylem with a pith in the centre. This arrangement of the vascular tissue is called
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Answer: Option A
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68
In Clostridium aceticum, the final electron acceptor during respiration is
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Answer: Option D
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69
Desert plants are generally
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Answer: Option B
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70
During classification, only those characters are taken into consideration which
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Answer: Option C
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