Living Things
All living things have six characteristics in common:
- Living things are made of cells.
- Living things are organized.
- Living things grow and develop.
- Living things respond to their environment.
- Living things reproduce.
- Living things use energy.
Some living things are unicellular, which means they are made up of only one cell.
Many living things are made of more than one cell and are called multicellular organisms.
Multicellular organisms can have several layers of organization. Groups of cells that work together and perform a specific function are called tissues.
Tissues that work together and carry out a specific function are called organs.
Organs that work together and perform a specific function are called organ systems.
During their lifetimes, living things grow, or increase in size.
Living things develop, or change, during their lifetimes.
Organisms that convert light energy to usable energy are called autotrophs.
Heterotrophs are organisms that obtain energy from other organisms.
Macromolecules - Substance in a cell that forms by joining many small molecules. Four types: Nucleic Acids, Lipids, Proteins, Carbohydrates
Many living things are made of more than one cell and are called multicellular organisms.
Multicellular organisms can have several layers of organization. Groups of cells that work together and perform a specific function are called tissues.
Tissues that work together and carry out a specific function are called organs.
Organs that work together and perform a specific function are called organ systems.
During their lifetimes, living things grow, or increase in size.
Living things develop, or change, during their lifetimes.
Organisms that convert light energy to usable energy are called autotrophs.
Heterotrophs are organisms that obtain energy from other organisms.
Macromolecules - Substance in a cell that forms by joining many small molecules. Four types: Nucleic Acids, Lipids, Proteins, Carbohydrates
What is needed to live
- All organisms need energy
- All organisms need food
- All organisms need water
- All organisms need a place to live
If an organism detects a change in its external environment, it will respond tothat change.
A specific environment where an organism lives is its habitat.
An organism’s habitat must provide the food and water that it needs.
A specific environment where an organism lives is its habitat.
An organism’s habitat must provide the food and water that it needs.
Classification
Scientists group organisms with similar traits and use a system to name them.
Binomial nomenclature is a naming system that gives each living thing a two-word scientific name.
The branch of science that classifies living things is called taxonomy.
A group of organisms is called a taxon.
Using taxonomy, scientists divide all living things on Earth into three groups called domains.
Domains are divided into kingdoms, and then phyla, classes, orders, families, genera, and species.
A dichotomous key is a tool used to identify an organism based on its characteristics.
Dichotomous keys contain descriptions of traits that are compared when classifying an organism.
Three rules to writing a Scientific name:
1. in Latin
2. in Italics
3. First word capitalized, second word not.
Binomial nomenclature is a naming system that gives each living thing a two-word scientific name.
The branch of science that classifies living things is called taxonomy.
A group of organisms is called a taxon.
Using taxonomy, scientists divide all living things on Earth into three groups called domains.
Domains are divided into kingdoms, and then phyla, classes, orders, families, genera, and species.
A dichotomous key is a tool used to identify an organism based on its characteristics.
Dichotomous keys contain descriptions of traits that are compared when classifying an organism.
Three rules to writing a Scientific name:
1. in Latin
2. in Italics
3. First word capitalized, second word not.
