A. He should add shells that are different colors, but the same size and type, to the tank and observe which shells the hermit crabs choose.
Durning an experiment you need to keep everything the same but only change the certain things based on your theory.
Such as how the student wanted to see if the color attracted the crab. If he had changed the size and type of the shell then the crab would have chosen the bigger one as they tend to grow into larger shells.
The answer is that it means that the oxygen would be difficult to carry throughout the body, which happens that ATP would be lacking. Because to create energy there’s a need for respiration and it requires an oxygen. Also, other body systems will slow down because anaerobic respiration doesn't create enough ATP for the entire body.
Pulmonary embolism because it’s unlikely to have a high heart rate with others
Mexico's CBR started later than Sweden's.
Answer: Both produce energy.
Explanation: Both provide each other with the necessary ingredients for the process to take place: glucose and oxygen for cellular respiration, carbon dioxide and water for photosynthesis.
