4.2 review

A human & a Tape Worm: The tape worm gets a place to live in the intestines of the human and food from the human. The human loses weight and nutrients from the tape worm.

• Mutualism
• Commensalism
• Parasitism

Bird & Tree: A bird builds a nest in a hole in the trunk of the tree. It is protected from the rain and predators. The tree is not harmed or helped by the bird.

• Mutualism
• Commensalism
• Parasitism

What type of symbiosis?  Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower.

• commensalism
• mutualism
• parasitism
• predation

Tree kangaroos live in the upper branches of trees in the rainforests of Queensland, as well as on the island of New Guinea. This is an example of the tree kangaroos ___.

• niche
• habitat
• community
• population

What is the name of an animal that is hunted and eaten by other animals?

• producer
• prey
• predator
• decomposer

The concept that predators can affect the size and distribution of other animals is known as 

• predation
• herbivory
• tolerance
• limitation

Groups of different populations that live in a given area and interact are called a(n)...

• Community

• Colony

• Population

• Ecosystem

Primary succession is... 

• When a hurricane causes a river to flood its banks
• When a farmer ploughs his fields to remove all existing plant life.
• When fire burns through a forest and ills all vegetation less than 1m tall.
• When increasing temperature causes a glacier to recede from an area of rocky ground

The secondary succession is 

• lichens and mosses arrive on bare rock and begin to trap soil
• a complex, stable ecosystem is formed
• plants grow in an area devastated by a flood
• plants grow in a newly formed pond

A key stone species is...

• the top carnivore.
• has the largest population.
• has the most specialized niche.
• determines numbers and types of other species.