Answer:
true 
Explanation:
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Answer:
Option A
Explanation:
Thyroid is primarily caused by lack of iodine but there are other reasons as well that lead to increased size of the thyroid gland. Some of these reason is 
a) over- or underproduction of thyroid hormones
b) Nodules in the glans
Some times, due to overstimulation immune system itself attack the thyroid gland thereby producing excess thyroxine and hence causing  the thyroid to swell
Thus, Option A is correct
 
        
             
        
        
        
Answer:It went into the air through evaporation.
Explanation:
 
        
             
        
        
        
Thymine and cytosine are classified as "Pyrimidines" and have one ring of carbon and nitrogen atoms for each base.
        
             
        
        
        
The answer is C
because Lithium and sodium belong to the same column.