+why should a patient begin and end a timed urine collection period with an empty bladder +

Which of the following is a question of morality? a.) delierately reporting false data b.) accidentally reporting false data c.) kepping a sloppy record of experimental observation d.) condition a drug experiment which will harm a lab rats

Nucleic acid certain protein cell membranes certain carbohydrates

In general, are there any major differences that you can see? explain