Category 1
Category 2
Category 3
Category 4
Category 5
100
Humans, like you, are ___________.
organisms
100
A group of cells with the same function make up this...
a tissue
100
An organ system has ___________.
two or more organs
100
The highest level of organization is the _________.
organism
100
What is the smallest unit that can perform all the processes necessary for life?
cell
200
Even simple multicellular organisms can have _____________ cells.
specialized
200
True or false. Scientist Matthias Schleiden contributed to the cell theory by concluding that all plant parts were made of cells.
True
200
What part of the animal cell forms a barrier between the cells and its environment?
cell wall
200
Ribosomes, the organelles that make proteins, are found on the membranes of the ____________.
endoplasmic reticulum
200
What part of the cell acts as the cell's delivery system?
endoplasmic reticulum
300
An organ consists of _________________.
two or more tissues
300
Larger size, longer life, and specialization are three advantages to being a _____________.
multicellular
300
True or false. A cell does everything needed for life.
True
300
Where do cells come from?
cells
300
What protects the inside of a cell from the outside world?
cell membrane
400
The cell theory was developed by __________ and ________.
Virchow and Schwan
400
The complex sugar cellulose is found in the cell walls of ___________.
plants
400
What is cytoplasm?
the fluid inside a cell
400
Where does photosynthesis take place in a cell?
in the chloroplasts
400
True or false. During the process of diffusion particles move from areas of higher concentration to lower concentration.
True
500
True or false. Osmosis is important to cells because cells are filled with fluids that are made mostly of water.
True
500
Why do cells need to produce new cells?
In order to replace cells that have died.
500
A cell moving particles with the use of energy is called __________ transport.
active
500
Food particles move through a cell membrane without using energy in a process called __________ transport.
passive
500
Most complex organisms obtain energy through ___________.
breathing
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