The ecosystem is everything that exists in a particular environment.
Answer:The helix structure Of DNA helps prevent it from been expose and also the sugar and phoshate group that are important components of nucleotides forms a backbone on the helix structure or the polynucleotide this back bone is hydrophobic i.e water loving hence wouldn't allow for penetration for water.
2. Hydrogen bond is formed between this bases to keep them in place.
Explanation:
A common theme in biology is that energy flows through biological systems while matter IS RECYCLED. Energy and matter are not destroyed in the ecosystem. The energy is transformed and the matter is recycled. In a food web, the food is transferred from one organism to another in different forms. this shows that the same molecules and atoms are recycled as the same molecule is used by one organism and then transferred to the second organism.
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When antibiotics kill too many good bacteria in the digestive tract fecal transplants can help replenish bacterial balance
