An engineering cycle is meant to assess the environmental impacts in relation to economic impacts on a product. The assessment is the whole life cycle of a product consisting of production, use phase and end of life. It's important because it helps mold the standard of living for generations to come and be sustained indefinitely. It protects against negative environmental factors but also reduces the cost of production for business', also.
Some bacterial organisms are autotrophic, like the plant kingdom. They can also be single-cellular. They both have a cell membrane and some have a cell wall, like plant cells.
The answer is a. an organ :))
