Exam 45: Community and Ecosystem Ecology

As animals take in food energy approximately 10% of it is made available to the next level in the food chain.Which of the following is one of the ways in which the energy is used by the organism and not passed along?

Compared with the numbers of grasshoppers or deer,there are not a lot of mountain lions.The reason that large and fierce top-level carnivores are rare in an ecosystem is that

The only heterotrophs required in an ecosystem are

Consider the following food chain: hawk - rabbit - clover.Each species will contain a different amount of calories in its body (clover: 10 calories,rabbit: 500 and hawk: 1200).Each species has a different daily caloric requirement (clover: sunlight,rabbit: 100 calories,hawk: 300). How many clover plants,per day,does it take to support one hawk?

All food chains begin with a photosynthetic producer.

If there are 12,000kg in the base of an ecological pyramid,how many kg will be found in the body tissue of the tertiary consumers?

Is it possible that the carbon atoms in your body may have once made up the living tissues of another person or animal in earlier times? This is

Consider the following food chain: hawk - rabbit - clover.Each species will contain a different amount of calories in its body (clover: 10 calories,rabbit: 500 and hawk: 1200).Each species has a different daily caloric requirement (clover: sunlight,rabbit: 100 calories,hawk: 300). How many clover plants,per day,does it take to support one rabbit?

MacArthur discovered that five species of warblers coexisted on spruce trees by foraging on the same caterpillar,but in different places of the tree canopy.This is

Energy flow in an ecosystem begins with

Which of the following statements about parasitism is NOT true?

Chemical cycling may involve which of the following?

A community that contains a low species diversity will often have a high species richness.

Which of the following associations between organism and nutrient source is incorrect?

Which of the following associations is incorrect?

All the populations of all the different species interacting with one another in the same environment is called

In an Asian rice paddy,carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves,stems,and roots of the same plant.They can survive at the same time in the same rice paddy because they occupy

Organisms in all trophic levels may be consumed by decomposers.

Approximately what percentage of the energy in one trophic level is incorporated into the next trophic level?

_____ is the interaction between two species as both attempt to use the same environmental resources.