Science

Episode 02

INTERACTIONS AMONGINTERACTIONS AMONG

LIVING THINGSLIVING THINGS

OBJECTIVE : In this unit we will study OBJECTIVE : In this unit we will study the different relationships between the different relationships between

organisms living together. Then we will organisms living together. Then we will also be able to identify the needs that also be able to identify the needs that

must be met by an organism’s must be met by an organism’s surroundings, biotic and abiotic parts of a surroundings, biotic and abiotic parts of a

habitat, and describe the levels of habitat, and describe the levels of organizatoin within an ecosystem.organizatoin within an ecosystem.

Symbiosis

Competition

Predation

Competition is the struggle between organisms to live in

an area with limited resources

O

What is a Predator ?

who Kills another for Food

What is a Prey ?

the Food for predators

Predator Adaptations: Adaptations that help them to catch the preys. For example: Speed, Sharp teeth, Toxins, Claws, Camouflage, etc.

Prey Adaptations: Adaptations help preys to escape from predators. For example: Speed, Change color, Spines, Toxins, Shields, etc.

Prey adaptations

Prey adaptations

False Coloring

Prey adaptations

Prey adaptations

W A R N I N G

COLORING

M O R T A L

Predator adaptations

Predator adaptations

Mutualism: Both species benefit

Parasitism: One specie benefit while the other one is harmed.

Commensalism: One specie benefit but the other one is not harmed

MUTUALISM

MUTUALISM

Parasites

• They live “ON” or “INSIDE” another organism ( called Host ) and harming it

ParasitismParasitism

Anemones tentacles are equipped with cells like small harpoons and contain a poison sufficient to paralyze or kill other fish or predators, But the anemone treats the Clownfish as part of itself and does not sting it, but have no benefit from him.

Clownfishes have a close relationship with sea anemones