7th grade Science Q2 Assessment Review

What is the smallest unit of life?

• a cell
• tissue

• organ

• organ system

Answer explanation

The smallest unit of life is a cell. Cells are the basic building blocks of all living organisms, performing essential functions necessary for life.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

A group of similar cells that perform a specific function is called what?

• tissue

• organism

• organ

• organ system

Answer explanation

A group of similar cells that perform a specific function is called a tissue. Tissues are the building blocks of organs and play crucial roles in the body's structure and function.

Tags

NGSS.MS-LS1-3

What structure is made up of two or more types of tissues working together?

• tissue

• organ

• organism

• organ system

Answer explanation

An organ is defined as a structure made up of two or more types of tissues working together to perform specific functions, distinguishing it from simpler structures like cells or tissues.

What do we call a group of organs that work together to perform a specific function?

• organism

• tissue

• organ system

• cell membrane

Answer explanation

A group of organs that work together to perform a specific function is called an organ system. This term encompasses the collaboration of multiple organs to achieve a common physiological goal.

An individual living thing that can react to stimuli and reproduce is known as what?

• tissue

• cell

• organism

• organ system

Answer explanation

An individual living thing that can react to stimuli and reproduce is called an organism. This term encompasses all forms of life, highlighting their ability to respond to environmental changes and reproduce.

Which body system is responsible for transporting blood and nutrients?

• the circulatory system
• the respiratory system

• the digestive system

• the immune system

Answer explanation

The circulatory system is responsible for transporting blood and nutrients throughout the body, ensuring that all cells receive the necessary substances for energy and function.

This body system helps to protect the body against diseases and infections. What is it?

• the circulatory system

• the digestive system

• the immune system

• the skeletal system

Answer explanation

The immune system is the body's defense mechanism that protects against diseases and infections by identifying and eliminating pathogens, making it the correct answer.

Which body system controls and coordinates body activities through nerve impulses?

• the excretory system

• the muscular system

• the circulatory system

• the nervous system

Answer explanation

The nervous system is responsible for controlling and coordinating body activities by transmitting nerve impulses, making it the correct choice for this question.

This system allows for movement and provides structure to the body.

• the skeletal system

• the nervous system

• the muscular system

• the immune system

Answer explanation

The muscular system is responsible for movement and provides structure to the body through muscles that contract and support skeletal structure.

Which system is primarily responsible for breaking down food and absorbing nutrients?

• the excretory system

• the integumentary system

• the muscular system

• the digestive system

Answer explanation

The digestive system is primarily responsible for breaking down food and absorbing nutrients, making it the correct choice for this question.