<span>Some of the things that would make the experiment invalid would be, if there was a variation in the behavior of the class with respect to food - for example, if some people ate their breakfast earlier than the others. This then would mean that some students would have already digested their breakfast during the morning classes and the others would still be digesting. </span>
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life
Explanation:
Watching The moon with his telescope
I know they carry diseases which can harm or kill the animal it is attached to. These diseases can taint the meat of the animal so it wouldn't be wise to eat it which stinks if the animal is bread for eating. They can also irritate the skin and cause rashes, or even eat the flesh of the animal away.
