Unlike meiosis, mitosis can

a. use crossing-over to produce genetically varied offspring
b. cut the chromosome number in half.
c. result in two diploid daughter cells
d. produce new cells

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.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex