Which organ systems deliver oxygen to body cells?
respiratory and excretory systems
muscular and immune systems
respiratory and circulatory systems
endocrine and lymphatic systems

Abanana plant produces rhizomes, which are involved in?

Some technological solutions to problems like global warming meet the specific needs and situations of local communities. an example from india involves converting the solid waste from cattle into clean-burning fuel for cooking. this reduces the amount of greenhouse gases, specifically methane and carbon dioxide, released into the environment from wood fires. when evaluating the feasibility of implementing this solution, computer models are used to weigh costs against benefits. what factor is least likely to impact the decision on adopting this technology?

Cells destroy body cells infected by a virus or bacteria.