What is the term for anything that takes up space and has a mass atom electron matter water

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

What feature of cell theory is best demonstrated in the image

What are some possible short and long term medical concerns for crew members on longer space exploration trips