Category
|
Observed Characteristics
|
|||
Flu virus
(virus)
|
Salmonella
(bacteria)
|
Sunflower
(plant)
|
House lizard
(animal)
|
|
Made of up the same chemical substances
|
Nucleic acid
DNA or RNA
Protein coat
|
RNA
DNA
Phospholipids
Polysaccharides
|
Carbohydrates
(cellulose, hemicellulose, pectin)
|
Water
Protein
Ash
|
Composed of a cell/cells
|
No
|
Yes (gram-negative)
|
Yes
|
Yes
|
Require water and a source of energy
|
No; rely on the energy within the living cell the virus has infected
|
Yes; inorganic compounds
|
Yes; from the sun
|
Yes; heat
|
Reproduce and grow
|
Reproduce only
|
Yes (binary fission)/Yes
|
Yes
|
Yes
|
Have limited lifespans
|
No
|
No
|
Yes
|
Yes
|
Respond to surroundings; homeostasis
|
Yes; No
|
Yes
|
Yes
|
Yes
|
Have the ability to move
|
Yes
|
Yes
|
Yes
|
Yes
|
Repair injuries to themselves
|
No
|
Yes
|
Yes
|
Yes
|
Undergo change over time
|
Yes
|
Yes
|
Yes
|
Yes
|
Which of the four (virus, bacteria, sunflower and house lizard) is not considered as a living thing? Give the reason for your answer.
Virus. Viruses need hosts, but until they enter a living cell, they can't do anything on their own. Without a host, they cannot reproduce.
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