A biology student wanted to study how the amount of light affects the growth of aquatic plants over the course of a week. She set up 2 tanks with 4 plants in each. Both tanks were identical in every way except for the amount of light provided. What is one thing the student could do to improve the accuracy of her
results?

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.