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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