Classification Test Reteach

3/8 Classification Test Reteach

1. How did Aristotle group organisms? Based on what two things?

Aristotle grouped organisms into two
groups: plants and animals

He did not know anything about DNA,
reproduction, or cells. He grouped
organisms based on what they looked
like and where they lived.

For example, Aristotle called a penguin
and a fish both “water animals.” Are
they alike at all?

2.Write one question that new classification uses to form more groups.

New classification has more groups that
we form by asking questions:

1.

Does it have a nucleus and
organelles? (eukaryote or
prokaryote)

2.

How does it get energy? (autotroph
or heterotroph)

3.

What type of body does it have?
(unicellular or multicellular)

4.

How does it reproduce? (asexual or
sexual)

3.How do we group organisms now? Based on their what?

Now we group organisms according to their body
characteristics.

Multiple Choice

Early scientists classified organisms into two groups, plants and animals. Which of the following questions would have been useful to help them add more classification rules, instead of just "plant" and "animal"?

• Where does the organism live?

• Is the organism multicellular or unicellular?

• Does the organism move?

Multiple Choice

Aristotle classified organisms as plants or animals. For example, he classified penguins and fish as water animals. Why is this grouping incorrect, according to the modern systems of taxonomy?

• Modern taxonomy places organisms together based on similar body characteristics.

• Modern taxonomy places organisms together based on where they live.

• Aristotle placed organisms into groups based on their DNA.

4.What type of organism has a nucleus?

Remember each kingdom has rules!

1.

Does it have a nucleus and
organelles? (eukaryote or
prokaryote)

2.

How does it get energy? (autotroph
or heterotroph)

3.

What type of body does it have?
(unicellular or multicellular)

4.

How does it reproduce? (asexual or
sexual)

5.What is one rule for classifying plants?

What are the rules for classifying plants?

Nucleus? Yes eukaryotes

Body type? Multicellular

Energy source? Autotrophs that do
photosynthesis in the sun.

Reproduces? Asexual or sexual

These are the rules we use for plants!

6.What is one rule for classifying fungi?

What are the rules for classifying fungi?

Nucleus? Yes eukaryote

Body type? Multicellular or unicellular

Energy source? Heterotrophs! They break
down and absorb dead things like logs.
No sunshine needed!

Reproduces? Asexual or sexual

7.What is one rule for classifying animals?

What are the rules for animals?

Nucleus? Yes eukaryote

Body type? Multicellular

Energy source? Heterotrophs! They eat
other living things!

Reproduction? Mostly sexual, some
asexual

Multiple Choice

Plants and fungi used to be classified in the same kingdom. Modern scientists have learned a lot about fungi and moved them into a new, separate kingdom. When they ask questions, they can separate fungi from the plants with one simple answer.

One question below is one of the rules we learned. It shows one difference between plants and fungi. Which question is it?

• Do both plants and fungi have cells?

• Do both plants and fungi reproduce?

• Do both plants and fungi use sunlight to make food?

Multiple Choice

Grass, ferns, and pine trees are classified in the kingdom Plantae. They are all multicellular eukaryotes. What other characteristic below is the BEST reason to classify them all as plants?

(think about the rules for classifying!) 

• Some of them make seeds for reproduction.

• They all do photosynthesis for their energy.

• They all have thick branches for support.

Multiple Choice

Use the information and chart to answer the following question. 

Two students were working to identify the kingdoms.

Kingdom A: no nucleus, has a cell wall, has autotrophs or heterotrophs, unicellular

Kingdom B: has a nucleus, no cell wall, heterotrophs, multicellular

Which students correctly identified each kingdom, and for the correct reasons?

• Kingdom A is bacteria because it is unicellular and prokaryotic.

  Kingdom B is animal because it is eukaryotic and heterotrophic.

• Kingdom A is fungi because it is autotrophic and unicellular.

  Kingdom B is animal because it is eukaryotic and heterotrophic.

• Kingdom A is animal because it is prokaryotic and unicellular.

  Kingdom B is bacteria because it is unicellular and prokaryotic.

Multiple Choice

Use the information to answer the following question. 

The teacher gives the students a new organism to investigate. The teacher also gives them the following clues:

● The organism performs photosynthesis. 

● The organism is multicellular.  

● The organism has a cell wall. 

Into which kingdom should the students classify the new organism, and why?  

• Students should choose the fungi kingdom because fungi perform photosynthesis and have cell walls.

• Students should choose the bacteria kingdom because bacteria have cell walls and are multicellular.

• Students should choose the plant kingdom because plants perform photosynthesis and have cell walls.

8.What two kingdoms have unicellular organisms only?

Some kingdoms have only unicellular
organisms:

Bacteria

Archaea

One kingdom has unicellular and some
multicellular.

Protista

9.What two kingdoms have prokaryotes only?

What is the main rule that separates the
bacteria and archaea from protista?

How are they very different?

Bacteria and Archaea do NOT have a
nucleus or organelles. They are
prokaryotes.

10.What are two characteristics of plants shown here?

Even though many Protista are
unicellular, they ALL have a nucleus.

They are ALL eukaryotes.

Some of them actually have chloroplasts
and do photosynthesis. They have other
organelles also.

*wait: plants have chloroplasts but they
are multicellular!*

11.Why do bacteria not use chloroplasts to do photosynthesis?

Some bacteria and archaea are
autotrophs.

BUT do they have organelles? Nope!

So they cannot do photosynthesis and
they do not have chloroplasts.

Multiple Choice

Look at the organism in the picture. It is made of only one cell that moves using a whip-tail called a flagella. Inside the cell there are chloroplasts and a nucleus. What kingdom does this organism belong in and why?

• Bacteria, because it is unicellular and it is an autotroph

• Protista, because it is unicellular and eukaryotic

• Plantae, because it has chloroplasts and is an autotroph

12.What is the smallest category with only one type of organism in it?

Kingdom: the largest category

Phylum: smaller

Class: smaller

Order: smaller

Family: even smaller

Genus: much smaller

Species: only one organism,

smallest category

Kingdom is the most
general group.
For example, Kingdom
Animalia contains ALL
animals.

Species is the most
specific group because
it refers to ONE type of
organism only.
For example, Ursus arctos
is only one type of
organism.

13.What is one kingdom that has many types of organisms that make their own food?

Look at it again without
pictures.

Think of one kingdom that has many different types of organisms. This kingdom is multicellular, eukaryotic, with chloroplasts.

Then think of ONE species in
that kingdom, ONE TYPE of
organism.

14.What is one species of plant?

Look at it again.

One kingdom is Kingdom
Plantae. There are trees,
grasses, mosses, ferns, small
shrubs, vegetables, and more.

One species is a wild
strawberry, Fragaria vesca.

How do we break down each kingdom into smaller groups?

Which is a smaller group,
specific to one type?

All of the plants in the plant
kingdom?

Or one species of plant, a wild
strawberry? YES!

Multiple Choice

Which of these groups is the most specific and only contains one type of organisms

• Kingdom Animalia

• Genus Panthera

• Species Leo (lion)

15.What two levels of organization do we use to make the scientific name?

Linnaeus used the last two levels of
classification to name every organism.

Look at the grizzly bear - the light brown
bear.

The next to last level is the GENUS.

The last level is the SPECIES.

So the grizzly bear’s scientific name is
Ursus arctos.

16.How do we know two organisms are closely related?

We also tell how closely related organisms
are, based on their genus and species.

Look at the two bears in Genus Ursus, the
grizzly bear and the black bear.

Grizzly bear: Ursus arctos

Black bear: Ursus americanus

They are in the same genus and have the
same first name! They are closely related.

How do we name organisms with a scientific name?

Are the grizzly bear and the fox closely
related?

See how far apart they are in the chart?

Grizzly bear: Ursus arctos

Fox: Vulpes vulpes

Their first names are different, so they are
in different genus and are not closely
related.

Multiple Choice

Does a Kangaroo rat (Diapodomys compactus) and a Kangaroo (Macropus osphranter) belong to the same genus? 

• For both animals, the second part of their scientific name is different. They are not in the same genus.

• For both animals, the first part of their scientific name is different. They are not in the same genus.

• Both animals have a two-part scientific name. They are in the same genus.

17.Write the steps that you use to classify the bear.

Try the dichotomous key to identify the bear:

1a. Hard outer shell

Go to 2.

b. No hard outer shell

Go to 3.

2a. Has 8 legs

Spider

b. Has 6 legs

Insect

3a. Has wings

Bird

b. Does not have wings

Go to 4.

4a. Has fur

Mammal

b. Does not have fur

Reptile

How do we use a dichotomous key to identify organisms?

What steps did we use to decide it was a mammal?

1a. Hard outer shell

Go to 2.

b. No hard outer shell

Go to 3.

2a. Has 8 legs

Spider

b. Has 6 legs

Insect

3a. Has wings

Bird

b. Does not have wings

Go to 4.

4a. Has fur

Mammal

b. Does not have fur

Reptile

How do we use a dichotomous key to identify organisms?

We used these steps to decide that the bear is a mammal.

No hard outer shell

Does not have wings

Has fur

Mammal

Multiple Choice

Solange found a bird that fell out of its nest. She used a dichotomous key to help her decide what type of food it eats. She concluded that the bird she found eats grub worms. Look at the image.

What information about the bird led her to this conclusion?

Hint: work backwards! Start with grub worms. What characteristics belong to the bird that eats grub worms?

• The bird has talons and a long, pointed beak.

• The bird has talons and a short, pointed beak.

• The bird has webbed feet and a throat pouch.

Multiple Choice

According to the dichotomous key, which bird in the image is the Common Loon? (Hint, try each bird in the dichotomous key and see what you get! Start with Bird A)

1a. Head dark-colored.............................................................go to step 2

  b. Head light-colored............................................Scissor-tailed flycatcher

 

2a. Beak straight....................................................................go to step 3

  b. Beak curved................................................................Red tailed hawk

 

3a. Beak dark-colored...........................................................Common loon

  b. Beak light-colored.........................................................American robin

• a

• b

• c

You did it!