Characteristics of Life and Cells Test Review

Use the word below in the diagram and place the words in the appropriate column.  Prokaryotic Cell or Eukaryotic Cells

younger

older

has nucleus

no nucleus

unicellular only

ancient

simple

complex

mainly bacteria

multicellular

    Prokaryote                                                Eukaryote

        

older

no nucleus

unicellular only

simple

mainly bacteria

ancient

younger

has nucleus

complex

multicellular

What are the 6 characteristics of living things?

1.  all living things made of cells

2.  contain similar chemicals

3.  grow and develop

4.  respond to surroundings

5.  use energy

6.  reproduce

        

Word Bank

stimulus

external stimulus

internal stimulus

response

cell

nucleus

structure

function

cell                         basic unit and structure of an organism

nucleus                         known as the brain of the cell

internal stimulus                stimulus from inside the body (hunger)

external stimulus                stimulus from outside the body (weather)

function                        the job something does

structure                        the way something is made

response                        how something responds to a stimulus

stimulus                        a change in an organism's surroundings that causes the organism to         react

Word Bank

multicellular

unicellular

sexual reproduction

autotroph

heterotroph

asexual reproduction

heterotroph                        can not make its own food

unicellular                         one cell

sexual reproduction         two parents

asexual reproduction         one parent

autotroph                         can make its own food

multicellular                         more than one cell

What are the 3 components of cell theory?

1.  the cell is the basic unit and structure of all living things

2.  all living things are made of cells

3.  all cells come from other cells

What is the most abundant substance in cells? water

Living things grow and develop by cells increasing in size and adding new cells.

Circle the internal stimulus  and underline the external stimulus.

hunger        weather                an animal biting another animal                thirst

sleepy        light                a hot stove                        an animal running from a predator

Draw a line and connect the stimulus to the response

it’s raining                                                get a drink

it’s cold                                                eat

it’s dark                                                use an umbrella

it’s hot                                                put on a coat

thirst                                                turn on light

hunger                                                sweat

True or False

T         If homeostasis is disrupted an organism can die

F        an organism made of more than one cell is considered unicellular

T        autotrophs can make their own food

T          DNA is nucleic acid

F        shivering and sweating are voluntary responses

T        response is reacting to a stimulus

F        all cells have the same function

T        prokaryotes are older than eukaryotes

F         prokaryotes are more complex than eukaryotes

Fill in the Blank

Most single celled organisms reproduce by asexual reproduction.

A plant growing toward light is an example of response  to stimulus.

Most unicellular organisms reproduce asexually.

DNA is a: carbohydrate, lipid, protein or nucleic acid.

All organisms require energy which they get from food.

Circle the response and underline the stimulus.

drinking water                 thirst                        hunger                cold weather        

eating                        putting on a coat        sleeping                sweating        

hot weather                        running from prey                                rain

being chased by predator                        using an umbrella