What is the correct order of the first 6 levels of organization from smallest to largest?

What's the wrong with this order:

Organ--Tissue--Cell--Organ system--Organism

The brain is part of the nervous system. Which of these completes the analogy, brain is to the nervous system as ________ is to __________.

The respiratory system is a part of the human body. Which of the following best completes the analogy, respiratory system is to the body as _____________ is to ______________.

The ____________________ system is like the nucleus because it controls the body.

The _______________________ is like the Digestive system because they both break down food to release energy.

The cytoplasm is like the __________________ system because they both contain fluid that transports oxygen and nutrients around the body and the cell.

The cell membrane is like the ______________________ system because they are flexible and thin barriers on the outside protecting from germs.

The ____________ is like the Skeletal system because they provide shape, structure and protection.

The ____________________ is like the digestive system because it breaks down food and removes solid waste.

Which organelle helps the plant eat by absorbing light energy from the sun?