Vitamin A deficiency is the leading cause of preventable blindness in children.
<span>Regions of DNA that read the same regardless of the direction are called Palindromes. The sequence of nucleotides is the same whether you start from the 3' end or the 5' end. Palindromes may occur due to chromosomal inversion or due to breakage.</span>
Human beings contribute to the phosphorus and sulfur cycles by using chemical fertilizers for the soil. This includes mostly synthetic fertilizers that can often be full of various molecules that include phosphorus and sulfur in them.
1. add heat and components with lower boiling points will evaporate while heavier molecules will turn back into liquid
2. vapor reaching the top of the column is collected in an industrial condenser
3. substances remaining the the column continue the process
They are called hand antiseptics.
