Unit 5 Test Review

Flowering plants are complex organisms composed of various structures that work together to perform specific functions. What type of structure is formed by a group of similar cells that work together to perform a specific function?

• An organ

• A tissue

• An organ system

The skeletal system is the body system that is involved in movement and protection of internal organs. The illustration shows the skeletal system of humans.

• The individual bones

• Bones, cartilage, tendons, and ligaments

• Cells, tissues, and organs that work together

The digestive system of an earthworm consists of specialized structures such as the crop and the intestine. What level of organization BEST describes each of these structures?

• An organ

• A tissue

• A cell

The skin is the largest organ in the human body. It protects the network of muscles, bones, nerves, blood vessels, and everything else inside the body. What can you conclude about the type of structure the skin represents?

• The skin is not made of cells.

• The skin is made up of different tissues.

• The skin works independently of other body systems.

Study the structure shown below. Suppose that thousands of these structures work together to carry out a life function.

Which object is made up of many structures in the diagram above working together?

• A tissue

• A cell

• A molecule

Different types of living things have different levels of organization. What represents the highest level of organization in any living thing?

• An organ

• A tissue

• An organism

Patterns can be observed in the hierarchical organization of organisms. The illustration below shows some of these patterns.

What can you conclude from this illustration about the organization of an animal’s body?

• Organ systems work together in the body.

• There are a fewer number of organs than cells in the body.

• Organ systems are not specialized.

Which series lists the hierarchy of life from largest to smallest?

• Molecule, tissue, cell, organ

• Organism, organ system, organ, tissue

• Molecule, cell, tissue, organ system

Which of the following is made of tissues and is part of an organ system?

• A heart

• A muscle cell

• A water molecule

The tissues of vascular plants are organized into more complex structures that carry out a variety of functions in the plant. What structure is formed by a group of tissues that work together to carry out a specific function?

• Organ system

• Organism

• Organ