The bacteria species known as escherichia coli is capable of using oxygen to produce energy in a process known as respiration. it can also produce energy if no oxygen is available by using a process called fermentation. this ability is best described by which of these characteristics of living things?

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?