Ecosystems, organisms and relationships

____________ is the variety of living things in the world.

What type of symbiosis?  Skunks often live in burrows that have been dug and abandoned by woodchucks.  

• commensalism
• mutualism
• parasitism
• predation

The biotic factors in an ecosystem include

• plants only

• consumers only

• soil only

• all the living things

The direction of the arrows in a food web show _______.

• parasitic relationships
• symbiosis
• energy flow
• predator and prey

An increase in the population of an organism would most likely be associated with which of the following?

• A series of severe weather events in the habitat

• A decrease in necessary resources available

• An expansion of suitable living space

• An increase in animals that prey on the organism

Which type of relationship includes mutualism and parasitism?

• competition

• cooperation

• symbiosis

• predation

A coyote captures, kills, and eats a rabbit. What type of symbiotic relationship is this?

• Mutualism
• Commensalism
• Parasitism
• Predation

In this food web, what would happen if the zebra population declined due to a disease?

(See Attached Diagram)

• The grass population would decrease.

• The giraffe population would decrease.

• Baboons would have a food shortage.

• There would be more competition among the lions, hyenas, and cheetahs.

Biotic can be defined as

• the living parts of an environment

• non-living parts of an environment

• rocks and water

• snakes and water

A squirrel's habitat in a dead log is considered a _____factor

• Biotic

• Abiotic

• cool

• secret