Signs of life
The basic unit that makes up all living things.
Cells
What is an individual living thing called?
An Organism
The type of organism made of more than one cell.
Multicellular organism
An organism made up of only one cell
Unicellular Organism
The three main needs of organisms to survive.
Water, energy, and resources
The source of energy for most plants.
Sunlight
Living things can make more of their own kind
Reproduction
Plants and animals both need this, but get it in different ways.
Energy
The process animals use to get energy from their food.
Eating or consuming food
Something that causes a living thing to change
Stimulus
An organism that develops from a single fertilized cell into a complex adult.
Growth and Development
The smallest part of an organism that can carry out life processes.
cell
The process of keeping body systems stable despite changes in the environment.
Homeostasis
The number of cells in a multicellular organism is always ______ than in a unicellular organism.
more
Essential for activities that go on inside cells
Water, Energy, Nutrients, or Oxygen