Relationships In Ecosystems

Question 1

Interdependence

Answer 1

Organisms depending on other organisms for survival.

Question 2

Habitat

Answer 2

Where organisms live.

Question 3

Competition

Answer 3

Two organisms attempting to obtain the same resource.

EG: Organisms may compete for food or shelter.

Question 4

Predation

Answer 4

When one organism kills and eats another, the attacker is called a predator and the one being eaten is called the prey.

Question 5

Mutualism

Answer 5

A relationship where two organisms live closely together and both benefit.

Question 6

Parasitism

Answer 6

A relationship where one organism lives on or in another organism (the host) and feeds off it.
EG: Headlice

Question 7

Commensalism

Answer 7

A relationship where one organism benefits and the other is unaffected.

Question 8

Changes in Abiotic Factors

Answer 8

Each species has a tolerance range for each abiotic factor.

The optimum range is the range within the tolerance range in which it functions best.

E.g. Most species can survive within a narrow temperature range - Penguins can tolerate sub - zero temperatures but would die at 40 degrees.