Levels of Organization - Cells to Biome

Levels of Organization

Today we are going to look at the different levels of organization and how they build upon one another.

Life is organized into different levels based upon size (from small to large).

Multiple Choice

Which of the following is the correct order of organization in living things from most basic (simple) to most complex?

• organism, cell, tissue, organ, organ system

• organ system, organ, tissue, cell, organism

• cell, tissue, organ, organ system, organism

• cell, organ, tissue, organism, organ system

Levels of Organization

Non-living

Living

Simple

Complex

Biomolecule

Life begins! →

INCREASING COMPLEXITY

DECREASING COMPLEXITY

Organisms and Cells

• Some organisms are unicellular. This means they are made of only one cell. Ex: bacteria, yeast

• Some organisms are multicellular. This means they are made of many cells. Ex: humans, trees

The basic unit of life.

CELL

Cell

• The smallest unit of life (building blocks of life)

• Cells are specialized by size and shape for the job they do.

• Example: nerve cell, also called a neuron

Multiple Choice

The basic unit of structure and function of living organisms

• organ

• organ system

• cell

• tissue

• organism

Tissue

• The same type of cells grouped together that are working together to do a specific job.

• Ex: nerve tissue, muscle tissue

TISSUE

Specialized cells working together to perform a specific function.

Animal Tissue

Plant Tissue

Multiple Choice

A group of similar cells that work together to form the same function is called .......

• organ

• cell

• organ system

• organism

• tissue

Multiple Choice

What is the difference between a cell and a tissue?

• cell is basic unit of life; tissue is group of cells that work as one

• cell is group of tissues; tissue is basic unit of life

• cell is basic unit of life; tissue is groups of different cells

• cell is group of organs; tissue is group of different cells

ORGAN

A group of tissues working together to perform a specific
function.

PLANT ORGANS

Organ

• A bunch of tissues working together to do a job.

• Ex: brain, heart

Multiple Choice

A structure that is composed of different kinds of tissues

• organ

• cell

• organ system

• organism

• tissue

A group of organs working together to perform a specific
function.

ORGAN SYSTEM

Organ System

• A bunch of organs working together

• Ex: nervous system, circulatory system, digestive system, etc.

Multiple Choice

A group of organs that work together to perform a major function....

• organ

• cell

• organ system

• organism

• tissue

Organism

• All cells, tissues, organs, and organ systems working together makes an organism.

• Ex: human, animal

Multiple Choice

Any living thing made up of one or more cells....

• organ

• cell

• organ system

• organism

• tissue

Multiple Choice

Which of the following is the correct order of organization in living things from most basic (simple) to most complex?

• organism, cell, tissue, organ, organ system

• organ system, organ, tissue, cell, organism

• cell, tissue, organ, organ system, organism

• cell, organ, tissue, organism, organ system

Multiple Select

Please choose from the options below, which are levels of organization.

• cells

• organ

• body

• skin

• tissue

Levels of Organization

Non-living

Living

Simple

Complex

Biomolecule

Life begins! →

INCREASING COMPLEXITY

DECREASING COMPLEXITY

POPULATION

A group of plants, animals, or living organisms of the
same species.

COMMUNITY

A group of plants or animals living in the same place.

A biological community of interacting organisms which
include the biotic and abiotic factors.

ECOSYSTEM

BIOME

An ecosystem of plants and animals that have common
characteristics for the environment they live in.

Multiple Choice

Which of the following explains an ecosystem?

• an interacting group of various species in a common location

• all the organisms of the same group or species who live in a particular geographical area and are capable of interbreeding

• a biological community of interacting organisms and their physical environment

• a single individual, or being

Multiple Choice

Biologists organize the environment into ecological layers so they can communicate about the areas more efficiently. The diagram shows an example of the organization. If biologists were discussing an organism, which layer on the diagram would they most likely be referencing?

• Layer A

• Layer B

• Layer C

• Layer D

Multiple Choice

Biologists organize the environment into ecological layers so they can communicate about the areas more efficiently. The diagram shows an example of the organization. If biologists were discussing a population, which layer on the diagram would they most likely be referencing?

• Layer A

• Layer B

• Layer C

• Layer D

Multiple Choice

Biologists organize the environment into ecological layers so they can communicate about the areas more efficiently. The diagram shows an example of the organization. If biologists were discussing a community, which layer on the diagram would they most likely be referencing?

• Layer C

• Layer B

• Layer A

• Layer D

Multiple Choice

Biologists organize the environment into ecological layers so they can communicate about the areas more efficiently. The diagram shows an example of the organization. If biologists were discussing an ecosystem, which layer on the diagram would they most likely be referencing?

• Layer A

• Layer D

• Layer C

• Layer B

Multiple Choice

Biologists organize the environment into ecological layers so they can communicate about the areas more efficiently. The diagram shows an example of the organization. If biologists were discussing a howler monkey, which layer on the diagram would they most likely be referencing?

• Layer A

• Layer B

• Layer C

• Layer D

Multiple Choice

Biologists organize the environment into ecological layers so they can communicate about the areas more efficiently. The diagram shows an example of the organization. If biologists were discussing the African Savannah, which layer on the diagram would they most likely be referencing?

• Layer A

• Layer B

• Layer C

• Layer D

Multiple Choice

Place the categories in order from smallest to largest.

• ecosystem, community, population, organism

• organism, population, community, ecosystem

• population, ecosystem, community, organism

• organism, community, ecosystem, population