Organization of living things

The food that you eat travels from your mouth, down your esophagus, into your stomach, and through your small and large intestines before your body rids itself of solid waste. As the food passes through your body, it is digested, and you get important nutrients from the food. Which of the following is the correct term used to describe a group of body parts working together to perform a specific function?

• an organism

• A tissue

• an organ system

• an organ

Living things are made up of cells. Cells are organized at different levels to form very complex living organisms like your body. Each level has a specific role or job to perform. Which of the following lists these levels in the correct order of organization from the simplest to the most complex?

• cells, tissues, organs, organ systems, organisms

• organisms, organ systems, organs, tissues, cells

• tissues, cells, organs, organisms, organ systems

• organs, organ systems, organisms, cells, tissues

All of the following are true EXCEPT:

• Skin is an organ

• Tissues are made up of organs

• Each organ is made up of its own kind of tissue

• Tissues are made up of cells.

The three major parts of the circulatory system are the heart, the blood vessels, and the blood. The heart is an organ made up of specialized cells. Which of these functions can the heart perform that individual heart cells cannot?

• pumping blood

• Removing waste

• Using energy

• Growing

Which phrase BEST describes the function of mitochondria?

• located in the cytoplasm

• bacteria-sized organelle

• converts energy for cell use

• contains a folded inner membrane

Which of these structures is unique to an animal cell?

• chloroplast

• Cell wall

• Centrosome

• Cytoplasm

What is the function of the cell wall?

• to protect and support the cell

• to perform different functions in each cell

• to prevent water from passing through the cell.

• to prevent oxygen from entering the cell

Which numbered part of the plant cell shown above is a liquid like substance that fills the cell?

• 1

• 2

• 3

• 4

What kind of cell is this?

• Animal

• Plant

• Bacteria

• Virus

Which cell structure functions like a school principal’s office?

• 1

• 2

• 3

• 4