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
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
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
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
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