Unit 0 Characteristics and Levels of Organization in Living Things

Made of cells and show organization

Cells are the smallest units of an organism that can be considered alive.

Unicellular

Made of one cell.

Multicellular

Made of many cells.

Cytoplasm

One of the four characteristics of all cells.

DNA

One of the four characteristics of all cells.

Cell Membrane

One of the four characteristics of all cells.

Ribosomes

One of the four characteristics of all cells.

Reproduce

Living things can produce new organisms.

Growth

An increase in size.

Development

Changes that occur as an organism grows.

Homeostasis

Keep internal conditions relatively stable.

Evolution

Change over time.

Universal genetic code

DNA.

Obtain and use materials and energy

Metabolism.

Producers

Make their own food.

Consumers

Eat other living things.

Respond to their environment

Living things react to stimuli.

Tropisms

Plant responses to stimuli.

Phototropism

Response to LIGHT.

Gravitropism

Response to GRAVITY.

Thigmotropism

Response to TOUCH.

Levels of Organization

Hierarchy of biological organization from atoms to biosphere.

Organism

An individual living thing.

Population

Group of organisms.

Community

Populations that live together.

Ecosystem

Community & surroundings.

Biome

Ecosystem & surroundings.

Biosphere

Contains all ecosystems.