Levels of Organization
_____________________________ are the basic unit of structure and function of all living things.
Cells
All living things are made of _____________________, which are the basic unit of life.
cells
The ____________________ generates most of the energy for the cell. It is sometimes called the powerhouse of the cell.
mitochondria
The _______________________provides structure and support. It is part of plant cells, but not animal cells.
cell wall
Cells come in all different shapes and sizes because their __________________ determines their ___________________.
structure; function
A(n) ___________________________ is a group of similar cells that perform the same function or job.
tissue
A ____________________ organism is made of only one cell (unicellular or multicellular).
unicellular
The ____________________ of the cell is the control center. This structure contains DNA.
nucleus
_______________________help with photosynthesis. They contain green pigments called chlorophyll.
Chloroplasts
Name 2 organs.
kidney, bladder, lungs, heart, brain, etc.
A(n) ___________________________ is a body part composed of different kinds of tissue that performs a specific function or job.
organ
A ____________________ organism is made of more than one cell (unicellular or multicellular).
multicellular
The ____________________ is semi-permeable. Some things are allowed in, while others are kept out. It is like a gatekeeper.
cell membrane
Plant cells tend to be __________________ (round or square) shaped because they have __________________________.
square; cell walls
Name 2 organisms.
cat, dog, human, plant, mushrooms, bacteria, etc.
A(n) ___________________________ is a group of organs that work together to do a major job.
organ system
A flower is an example of a __________________(unicellular or multicellular) organism.
multicellular
The ______________________ is the jelly-like fluid surrounding the nucleus inside the cell. The organelles float around in this.
chloroplast
Name the 2 structures that are part of plant cells, but not animal cells.
Cell wall and chloroplasts
Why are red blood cells and neurons shaped differently?
Red blood cells and neurons are shaped differently because they have different functions. Red blood cells are round, so they can carry oxygen and fit through blood vessels. Neurons have long extensions because they carry messages.
A(n) ___________________________ is any living thing.
organism
A bacteria is an example of a __________________(unicellular or multicellular) organism.
unicellular