3. range of tolerance a. occurs after a total disruption to the area, including removal of soil
4. limiting factors b. occurs after a disturbance that doesn’t totally remove the soil
5. secondary succession c. facets of the environment that impact an organism’s ability to survive, including sunlight, food sources, nutrients, and minerals
6. primary succession d. level of an environmental factor in which an organism can survive, such as temperature or salinity

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.

hello there the answer is d

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?