Which of the following is the basic unit of structure and function in the human body?

• Organ

• Cell

• Tissue

• System

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which system in the human body is responsible for transporting oxygen and nutrients to cells?

• Digestive system

• Circulatory system

• Nervous system

• Skeletal system

Tags

NGSS.MS-LS1-3

What is the main function of the respiratory system?

• Breaking down food

• Pumping blood

• Exchanging gases

• Sending signals

Which of the following is an example of a producer in an ecosystem?

• Grass

• Rabbit

• Hawk

• Mushroom

Tags

NGSS.MS-LS2-3

Which of these is an inherited trait?

• Riding a bicycle

• Eye color

• Speaking English

• Playing the piano

Tags

NGSS.MS-LS3-2

Which of the following is a learned behavior?

• A bird building a nest

• A dog sitting on command

• A spider spinning a web

• A baby crying

Which of the following best describes the relationship between cells, tissues, organs, and systems in the human body?

• Tissues are made of organs, which are made of systems, which are made of cells.

• Cells make up tissues, tissues make up organs, organs make up systems.

• Systems make up organs, organs make up tissues, tissues make up cells.

• Organs make up cells, cells make up systems, systems make up tissues.

Tags

NGSS.MS-LS1-3

Which of the following best explains why forests can support a wide variety of animal populations?

• Forests have only one type of plant.

• Forests provide many different habitats and food sources.

• Forests have no decomposers.

• Forests are always cold.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which of the following organisms is a decomposer in a pond ecosystem?

• Frog

• Algae

• Bacteria

• Fish

Tags

NGSS.MS-LS2-3

A student observes that some plants in a salt marsh have thick, waxy leaves. What is the most likely reason for this trait?

• To attract pollinators

• To store water and reduce water loss

• To help the plant move

• To catch insects

Tags

NGSS.MS-LS1-5