Twain is effective at using his humor because he uses it to entertain his readers. It makes his readers laugh and provides social criticism mixed with humor. Twain shows the dark side of human nature in a funny way and expresses a serious viewpoint through silly characters.
Answer:
Food webs are the best depictions of feeding relationships because they show a single path for the flow of energy through an ecosystem.
Food webs are the best depictions of feeding relationships because they show a single path for the flow of energy through an ecosystem.
Explanation:
• Note that a food web is only a single path with to and fro direction.

After reading the description attached to the graph represented on the picture, I would say that the resistance gene was present in the aphid population as a result of changes in the aphids’ local habitat by the insecticide. I consider the second option as a correct one because according to the amount of spreading of insecticide<span> per year there was a possibility that it caused a such a change.
Do hope it will help you!</span>
Answer:
A) Engulf the bacteria.
Explanation:
Invasins are basically enzymes (protiens) which act to damage the host cells locally. As E.Coli and Salmonella are the invasive bacteria , they need to invade the body cells in order to causes infection . It is involved in pathogenesis. So as the enter the body they release invasins ,bind to host cells and cause them to engulf the bacteria which is then carried to the desired location and cause disease.
Hence a) Engulf the bacteria is the right option