The smallest living level of organization is

• atoms

• molecules

• organelles

• cells

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Starting with cells, the fourth level of organization is...

• tissues

• organ systems

• organs

• cells

Tags

NGSS.HS-LS1-2

True or false. All cells (not including gametes) have the same DNA instructions.

• True

• False

The process in which certain parts of the DNA instructions are turned on or off is called...

• photosynthesis

• cellular respiration

• speiciation

• cell differentiation

Tags

NGSS.HS-LS3-1

Keeping the body at constant or near constant conditions is called...

• photosynthesis

• homeostasis

• cell differentiation

• the nervous system

Tags

NGSS.HS-LS1-3

True or false. Keeping you water levels at similar amounts in your blood by drinking water or peeing is an example of homeostasis.

• True

• False

Tags

NGSS.HS-LS1-3

Which 2 of the following body systems are in charge of the others to help maintain homeostasis?

• Respiratory System

• Nervous System

• Circulatory System

• Immune System

• Endocrine System

Tags

NGSS.HS-LS1-3

The main function of the nervous system is

• to transport materials through the body

• to exchange oxygen and carbon dioxide

• to break apart your food so you can absorb the nutrients/macromolecules in it

• to control and coordinate all the body systems

Tags

NGSS.MS-LS1-8

The cells of the nervous system are called...

• nuclei

• neurons

• stimuli

• lymphocytes

How are messages sent in the nervous system?

• chemical

• photosynthesis

• electric and chemical

• electric

Tags

NGSS.HS-PS2-5