When a colectomy is performed, a segment of the stomach is resected and an anastomosis is performed between the remaining ends?

The above statement is False.
When a colectomy is performed, a segment of the stomach is not resected and an anastomosis is not performed between the remaining ends. Colectomy is a surgical procedure to remove part or the whole colon. Colon is a long tube-like organ at the end of the digestive tract; it may be necessary to treat or prevent diseases and conditions that affect the colon. The Colon resection can be performed in two ways; convectional open surgery or laparoscopic surgery. 

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.