Classification of Living Things

A scientist discovers a new single-celled organism that can survive in boiling hot springs. Which domain most likely contains this organism?

• Bacteria

• Archaea

• Eukarya

• Protista

How would you best determine if an unknown organism belongs to the Plant or Animal kingdom?

• Check if it has a cell wall

• Observe how it obtains food (autotroph vs heterotroph)

• Count its cells

• Measure its size

Why might classifying a newly discovered organism be challenging if it has characteristics of both fungi and protists?

• Because both kingdoms can be unicellular

• Because both kingdoms can be multicellular

• Because both kingdoms can be heterotrophs

• All of the above

Tags

NGSS.MS-LS4-2

Which sequence best represents increasing complexity in cell organization?

• Bacteria → Archaea → Protist → Plant

• Archaea → Bacteria → Animal → Fungi

• Protist → Plant → Animal → Bacteria

• Animal → Plant → Bacteria → Archaea

Tags

NGSS.MS-LS4-2

NGSS.MS-LS1-3

If a single-celled organism has a nucleus and makes its own food, it is most likely a:

• Bacterium

• Protist

• Fungus

• Archaeon

What characteristic would BEST help distinguish between bacteria and protists?

• Whether they are unicellular

• Whether they have a nucleus

• Whether they can move

• Whether they live in water

Tags

NGSS.MS-LS4-2

Which statement about classification is FALSE?

• All eukaryotes have a nucleus

• All prokaryotes are harmful

• All plants are autotrophs

• All animals are heterotrophs

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

A scientist discovers an organism that is multicellular and gets energy by breaking down dead matter. This organism is most likely a:

• Plant

• Fungus

• Animal

• Protist

Tags

NGSS.MS-LS2-3

Why do scientists use a classification system?

• To make organisms easier to count

• To create a universal way to identify organisms

• To determine which organisms are more important

• To separate living from non-living things

Which characteristic is shared by ALL organisms in the Eukarya domain?

• They are multicellular

• They have a nucleus

• They can photosynthesize

• They are heterotrophs