Chloroplasts are organelles that are found in plant cells, but not in animal cells. Which of the following best explains why? F. Plants are heterotrophs, therefore, they do not need the chloroplast to carry out the process of photosynthesis.
G. Animals are autotrophs, therefore, they do not need the chloroplast to carry out the process of photosynthesis.
H. Plants are autotrophs, therefore, they need the chloroplast in order to carry out the process of photosynthesis.
J. Animals are heterotrophs, therefore, they need the chloroplast in order to carry out the process of photosynthesis.

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.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.