Chromosome represents packing of DNA with help of histone and other proteins. Tight packing of DNA and condensation into chromosomes make the RNA coding region of DNA inaccessible for RNA polymerase resulting in decreased rate of transcription. On the other hand, loose packing of DNA with histone proteins and unfolding of chromosomes expose the RNA coding region for enzymes and factors of transcription leading to increased rate of transcription.
<h2><em><u>In addition to natural factors, human activity can also alter ecosystems. Conduct research on a human activity that currently affects or can theoretically affect your chosen ecosystem. Use your food web model to explain how this change can affect the competition for food resources.</u></em></h2>
