A strand of DNA is in the double helix structure.. you can think of it as two interconnected spiraling stairs
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A is the best answer i just took the test.
Answer:Restless leg syndrome.
Explanation:
It is characterized with the urge to move the legs.it worsen with age and disturbs sleep.
It can.be caused by iron deficiency, amd chronic diseases e.g diabetes, kidney failure,Parkinson diseases and neuropathy.
Answer:
B
Explanation:
Fish take small amounts of oxygen from water bacteria however, i believe do not need oxygen
