Q5 of 30 Page 1

A boy has been diagnosed with ADA-deficiency. Suggest any one possible treatment.

Bone marrow transplantation is the one way in some children for the treatment of ADA deficiency.


Explanation:Enzyme replacement therapy is used in other cases, in which functional ADA is given to the patient by injection.


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3

What is ‘saltation’ according to de Vries?

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Identify the two correct statements from the following:

(i) Apiculture means apical meristem culture.


(ii) Spinach is iron-enriched.


(iii) Green revolution has resulted in improved pulse-yields.


(iv) Aphids cannot infest rapeseed mustard.


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What does ‘R’ represent in the given equation for productivity in an ecosystem?

GPP – R = NPP


 7

Where is good ozone present? Why is it called so?