Relationships in Ecosystem

Multiple Choice

A lion stalks a herd of antelope wading in a pond. A flock of water birds on the shore become startled by the sound of the lion’s approach and fly away with a great deal of noise. The birds’ sudden departure gives warning to the antelope, and they are also able to escape safely. What type of relationship exists between the birds and the antelope?

• competition

• mutualism

• commensalism

• parasitism

Multiple Choice

A lichen is a combination of two organisms, an alga and a fungus. The fungus gets its food from the alga while the alga gets water from the fungus. This is an example of which relationship?

• competition

• mutualism

• commensalism

• parasitism

Multiple Choice

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

Multiple Choice

When a mosquito bites you, you are the __________ and the mosquito is the  ____________.

• host, hostess
• parasite, host
• host, parasite
• prey, predator

Multiple Choice

When an Owl eats a Mouse

• Mutualism

• Commensalism

• Parasitism

• Predation

Unit 2: Energy Flow

Multiple Select

Mark all the organisms that are considered producers

Multiple Choice

What may happen if the snowshoe hare was removed from the food web pictured?

• The insects in the habitat would increase.
• The shrew population would decrease due to being only hawk food source.
• The willow tree population would decrease.
• Foxes would dies due to no food source. 

Multiple Choice

Part of a hydrothermal vent food web is represented in the diagram. Which organisms are both secondary and tertiary consumers in this food web?

• Zooplankton and mussels

• Chemosynthetic bacteria and amphipods

• Galatheid crabs and zoarcid fish

• Ratfish and octopuses

Multiple Choice

Food webs such as the one shown were first used in 1927 by the animal ecologist Charles Elton. The food web below represents the feeding relationships among different organisms. An environmental change that removed which of these organisms from the ecosystem would cause the most instability in the ecosystem?

• foxes

• zooplankton

• salmon

• auklets