Levels of Organization

In multicellular organisms, cells are organized into groups that work together to perform a specific function. What are those groups of cells called?

• Systems

• Bones

• Tissues

• Joints

Which of the following statements describes an organ?

• The basic unit of structure and function in living things.

• A group of cells that work together to perform a specific function.

• A structure in the body that is composed of different kinds of tissue.

• A group of organs that work together to perform a major function in the body.

How many levels of organization are there in living organisms?

• 1

• 3

• 5

• 7

The liver is composed of cells called Hepatocytes. Many Hepatocytes together in the liver form __________.

• Cells.

• Tissue.

• Organ system.

• Organisms.

The root and shoot systems together in plants form which level of organization?

• Cells.

• Tissue.

• Organ system.

• Organism.

The stomach is a collection of tissue that contracts to help digest food? The stomach is considered to be a(n) __________.

• Cells.

• Tissue.

• Organ.

• Organ System.

Look at the diagram and determine which answer choice would best fit in the X?

• Cells.

• Tissue.

• Organ.

• Organ System.

The picture shows a plant stem, and focuses on the plant's xylem. Plant xylem is composed of many cells that transport water. Xylem is classified as __________.

• Cells

• Tissue

• Organ

• Organ System

In the human heart, there are organs that pump blood through blood vessels. The combination of the heart and blood vessels are classified as __________.

• a tissue.

• a organ.

• an organ system.

• an organism.

This is a level of organization diagram. Which term does Row X represent?

• tissues

• cells

• organ systems

• an organism