INTERACTIONS AMONG INTERACTIONS AMONG LIVING THINGSLIVING THINGS

A characteristic that makes an individual better suited to its

environment may eventually become common in that species through a

process called ______________.natural selection

ADAPTING TO THE ENVIRONMENT

ADAPTATIONS- Behaviors and physical characteristics that allow organisms to live successfully in their environments.- Adaptations become common in a population due to natural selection.

There are three major types of interactions

among organisms:

- Competition- Predation- Symbiosis

COMPETITION

- The struggle between organisms to survive as they attempt to use the same limited resource.- Organisms compete for food, water, shelter, territory, and other resources.

PREDATIONPREDATION- An interaction in which one

organism kills another for food.

- The organism that does the killing is called the ________.predat

or- The organism that is killed is called the ____.pre

y

What happens to the moose population as the wolf population increases?

SYMBIOSISSYMBIOSIS- A close relationship between two species that benefits at least one of the species.

- The three types of symbiotic relationships are:

* Mutualism* Commensalism* Parasitism

MUTUALISMMUTUALISMA symbiotic relationship in which both

species benefit.

Black Rhinoceros/ Cattle Egret

The egret gets food

from eating bugs off the

Rhino’s back, and the rhino benefits by

getting pests removed from his

body.

COMMENSALISMCOMMENSALISM

A symbiotic relationship in which one species benefits and the other is neither

helped or harmed.

Barnacles attach themselves to

the whale allowing them

filter more water for food. The whale is not harmed or

benefited from the barnacles

presence.

WHALE ROLLING OFF BARNACLES

This whale is rolling around on the ocean floor to remove barnacles from

its body.

PARASITISM

PARASITISM- A symbiotic relationship in which one species benefits and the other is harmed but not usually killed.- The organism that benefits is called the _______ and the organism that is harmed is called the _____.

parasite

host

Tick sucking blood from its

host.

Sable Antelope/ Oxpecker What type of

relationship do these two species

have?Mutualism

Water Buffalo/

Oxpecker

What type of relationship does this

picture represent?

Predator - prey

What type of relationship does this picture represent?

Predator - prey

This is an example of what type of interaction?

Competition