Identifying cells, tissues, organs, organ systems, organisms, populations,

communities, and ecosystems as levels of organization in the

biosphere.

Grade 5 ScienceLevels of Organization

The following slides explain the levels of

organization from Cells to Biospheres

Cells

• A structural unit of all living things. The smallest unit classified as an living organism.

Tissues

• Tissues are an ensemble of cells, they are not the same but the are of the same origin, that carries out an function.

Organs• Organs are groups of tissue that perform

different functions. There are many organs in the body like skin, kidney, liver, and etc.

Organ SystemsSome types of organ systems are, Circulatory, Respiratory, Digestive,

Nervous, and Reproductive.

Organism

• A single living organism. Example: Humans, Cows, Birds, Trees.

Population• A group of organisms of one type

staying in the same area. An example is like and herd of cows on a plain, or the number of people living in Tuscaloosa.

Community• Different populations that live together.

Examples: Cows, snakes grass, hawk. • They must all be LIVING Things• The community below includes the horses,

cows, chickens & dogs

Ecosystems• These include the living & nonliving things

found in the community (people birds water soil dogs etc.

• Two examples of Ecosystems are wetlands and forests.

Biosphere• Our Biosphere is made up of all of the

biomes/ ecosystems on the planet earth.

QuestionsTest your

Knowledge

A Pod of bottlenose dolphins living in A Pod of bottlenose dolphins living in a specific region can be identified as a specific region can be identified as

which level of organization?which level of organization?• A. Biosphere

• B. Ecosystem

• C. population

• D. community

C populationC population

A population is a group of organisms of one type that all live in the same area.

Study the picture belowStudy the picture below

Which level of organization is BEST represented by the entire picture?Which level of organization is BEST represented by the entire picture?

• A. Organism

• B. ecosystem

• C. population

• D. community

B ecosystemB ecosystem

• An ecosystem is a community and its nonliving surroundings as labeled here

Air

Water

Bird

Fish

Alligator

Trees

BushesGrass

A group of cells that work together for A group of cells that work together for a common function would MOST a common function would MOST

LIKELY be described asLIKELY be described as

• A. a tissue

• B. an organ

• C. an organelle

• D. a community

A. a tissueA. a tissue

A tissue is a small group of cells used to make up organs such as the brain

Study the picture belowStudy the picture below

Which level of biological organization results from the combination of the living organisms shown in the picture?

• A. Biosphere• B. Ecosystems• C. Populations• D. community

D. communityD. community

A community is all living things (plants and animals) that live in a defined area

Which figure BEST represents the Which figure BEST represents the levels of organization in the ocean levels of organization in the ocean

from largest to smallest?from largest to smallest?A. Community

Organism

Ecosystem

Population

B. ecosystem

community

population

organism

C. organism

population

community

ecosystem

D. population

ecosystem

organism

community

B. Ecosystem, Community, Population, OrganismB. Ecosystem, Community, Population, Organism

Ecosystem, Community, Population, Organism is the levels of organization in descending order

Which sequence correctly identifies the Which sequence correctly identifies the levels of organization in a biosphere from levels of organization in a biosphere from

most complex to least complex?most complex to least complex?• A OrganismPopulationCommunityEcosystem• B ecosystemcommunitypopulationorganism• C communityorganismecosystempopulation• D populationecosystemorganismcommunity

B. ecosystemB. ecosystemcommunitycommunitypopulationpopulationorganismorganism

• An ecosystem is a community and all its surroundings making it the most complex and an organism is one living object making it the simplest

Study the tables below. Ospreys, egrets and cranes were observed in an area Study the tables below. Ospreys, egrets and cranes were observed in an area around a small oxbow lake at Perry Lakes Park in Alabamaaround a small oxbow lake at Perry Lakes Park in Alabama

Birds observed during one year

Bird Number observed

Osprey 63

Egret 85

Crane 22

Which student correctly categorized the observations according to the levels of organization in the biosphere

Student Organisms Population(s) Communities

1 3 3 1

2 3 1 3

3 170 3 1

4 170 1 3

A Student 1

B Student 2

C student 3

D student 4

C student 3C student 3

Since an organism is a single living thing you have to include all of them so 63+85+22=170 and a population is only one type of animal and three birds were being studied there were 3 populations and since a community is all the populations combined there is only 1 community

Study the Diagram belowStudy the Diagram belowForests, animals, sunlight, soil, water

Oak forest, grey squirrels, deer

Oak forest

Oak tree

• A Organism B ecosystem C Community D Population

Population community Ecosystem Organism

Community population Organism Ecosystem

Ecosystem organism Population Community

Which example below represents the organizational levels shown in the diagram?

B B ecosystem ecosystem

community community

population population

organism organism

An ecosystem is a community and its nonliving surroundings. Communities are populations in a defined area. Populations are groups of organisms. An organism is a single living thing.

• Study the picture10

A: PopulationB: CommunityC: Ecosystem*D: Organism

Which level of organization is BEST represented by the entire picture?This includes the water ,soil, animals & trees.

Hint: This includes the water ,soil, animals & trees.

• C. Ecosystem, because it is made up of the living & non living things.

• A scientist studied a coral reef in an ocean. The scientist made a data table to record what was observed. How many populations are represented by the data?

11

A: 2B: 6 C: 67D: 101

• The answer to that question is B. 6

• It asked how many populations, and there are 6 populations. (Sea turtle, Sea Star, Nurse Shark, Clown Fish, Parrotfish, Sea urchin. Each TYPE is a different population.

• The population of a town is the number of people that live there.

• A student preparing for a test in human anatomy studied the terms in the list. Which of the following represents a tissue in the human body?

12 Study the list of terms below.

: osteocyte: stomach: muscle:digestive system

A: Bone CellB: StomachC: MuscleD Digestive System

Hint: This word ends in cyte which means CELL

• The answer to that question was

C. Muscle Muscle is made up of cells that are

similar to each other

• because the stomach is an organ

• an osteocyte is a bone cell

• the digestive system is a whole system.

13 : Student Question

A herd of animals in the same area is an example of,

A.Population B.BiosphereC.OrganismD.Ecosystem

• The answer is A. population

• because, a population is a group of organisms of one type staying in the same area.

Great Job!!!