Cell Theory
According to cell theory, all cells come from...
Animals are classified as
heterotrophs
What does unicellular mean?
a living thing that has one single cell.
A cell with no nucleus is classified as
Prokaryote
A trait that makes survival harder is a(n)
disadvantage
Which invention helped scientists discover cells?
Microscope
An organism that makes its own food is called a(n)
Autotroph
Humans are multicellular or unicellular?
Multicellular
A cell with a nucleus is classified as
Eukaryotic
A trait that helps an organism survive is called a(n)
advantage
Who named the cell?
Robert Hooke
An organism that uses sunlight to make its own food is classified as a
Autotroph
Multicellular organisms are best described as organisms that
are made of many cells
Which feature is found in eukaryotic cells but not prokaryotic cells?
Nucleus
Having different fur colors in the same species is an example of what?
Variation
Rudolf Virchow added an important idea to cell theory.
What did Virchow state?
All cells come from preexisting cells
A student observes an organism that cannot photosynthesize but gets energy by breaking down other organisms.
How should this organism be classified?
Heterotroph
Which type of organism is made of many cells working together?
Multicellular
A scientist observes a cell that is very small, has DNA floating freely in the cytoplasm, and no membrane-bound organelles.
What type of cell is this?
Prokaryotic
What do we call a characteristic that is passed from parents to offspring?
Trait
State all 3 parts of the cell theory.
1. All living things are made of one or more cells.
2. Cell is the basic unit of life.
3. All cells come from preexisting cells.
An organism lives deep underground where sunlight does not reach. It survives by absorbing nutrients from decaying matter.
Which classification best fits this organism?
Heterotroph
An amoeba is best classified as which type of organism?
Unicellular
An organism is made of one cell, but that cell contains a nucleus and membrane-bound organelles.
How should this organism be classified?
Eukaryotic and unicellular
A sudden drought occurs in an area. Some plants survive because they have deeper roots.
What do we call the deeper roots that helped those plants survive?
Advantage or helpful trait