Chapter 4 Quiz A/B

A living thing is called an organism.

• True

• False

Answer explanation

True. An organism is defined as any living thing, which includes animals, plants, fungi, and microorganisms. Therefore, the statement that a living thing is called an organism is correct.

The smallest living part of an organism is an amoeba.

• True

• False

Answer explanation

The statement is false because the smallest living part of an organism is a cell, not an amoeba. An amoeba is a single-celled organism, but cells are the fundamental units of life.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

A tool that is used to see things that are very small is a microscope.

• True

• False

Answer explanation

A microscope is indeed a tool designed to magnify small objects, allowing us to see details that are not visible to the naked eye. Therefore, the statement is true.

The thin covering that holds a cell together is the cytoplasm.

• True

• False

Answer explanation

The statement is false because the thin covering that holds a cell together is the cell membrane, not the cytoplasm. The cytoplasm is the jelly-like substance inside the cell.

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NGSS.MS-LS1-2

The control center of a cell that directs the cell’s activities is the nucleus.

• True

• False

Answer explanation

True. The nucleus is indeed the control center of a cell, directing its activities and housing genetic material.

A group of cells all doing the same kind of work is called a ___.

• muscle

• nerve

• tissue

Answer explanation

A group of cells performing the same function is known as tissue. Muscle and nerve are specific types of tissues, but the general term for a collection of similar cells is tissue.

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NGSS.MS-LS1-3

A group of organs working together to do a job is called a ___.

• muscle

• system

• tissue

Answer explanation

A group of organs working together to perform a specific function is known as a system. For example, the digestive system includes various organs that work together to process food.

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NGSS.MS-LS1-3

Lungs, heart, stomach, and brain are all ___

• cells

• organs

• systems

Answer explanation

Lungs, heart, stomach, and brain are all organs in the human body. They perform specific functions essential for survival, distinguishing them from cells, which are the basic building blocks of life.

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NGSS.MS-LS1-3

The top layer of skin is called the ___.

• dermis

• epidermis

• muscle

Answer explanation

The top layer of skin is called the epidermis. It serves as a protective barrier and is crucial for skin health, while the dermis is the layer beneath it that contains connective tissue and blood vessels.

The prints made by the ridges on your fingertips are called ___.

• dermis

• epidermis

• fingerprints

Answer explanation

The prints made by the ridges on your fingertips are known as fingerprints. The other options, dermis and epidermis, refer to layers of skin, not the unique patterns formed by fingertip ridges.