C...the key is that they are photosynthetic...so they produce oxygen (like plants)!
Answer:
<em>Scientific models</em><em> are used to predict and elaborate the behaviour of the real objects in the field of physics, chemistry, ecology and earth science. </em>
<em>It is used to gain improved </em><em>understanding of the processes and systems. </em>
Explanation:
However, every model have some limitations because they are not the representative of every possible scenario. For instance, relationship between time and distance is the idea model, study of cell and its various parts uses physical model, predicting earthquake uses computer model.
DNA or RNA surrounded by a protein coat
Antibiotics are, initially, molecules naturally synthesized by microorganisms to fight against bacteria competing with their environment. This created a pressure of selection on the bacterial populations, leading to the appearance of resistant strains. In fact, when an antibiotic is used, only bacteria with defense systems against this molecule survive (and reproduce).
hope this helps
