The non-living part of an ecosystem

Different populations living and interacting with each other in the same area

The area between the highest mountain and the deepest ocean where life can be found

A pond ecosystem is shown in the diagram below. Which statement describes an interaction that helps maintain the dynamic equilibrium of this ecosystem?

Which statement describes an interaction that helps maintain the dynamic equilibrium of this ecosystem?

What does every food chain start with? (Even if it's an abiotic factor that is not drawn or written there!)

Which one is not a carnivore?

The table provides information on population density of mayflies (prey), a kind of insect, in a certain area over a few years. Many birds (predators) eat these mayflies.

Use the data about mayflies (prey) to predict which time period had the greatest increase in the bird (predator) population.

The chart shows predator and prey relationships in four different ecosystems.. Which is a correct example of a change that would happen to one population because of a change in the other population because of a predator/prey relationship?

The graphs show how the number of mice predators (animals that eat mice) and the food source of the mice (plants) changed from 1996 to 2002.

Based on this information about predators and food, which year would you predict would have the highest population of mice?

This occurs when niches overlap between species and they have to compete for resources.

Leeches are organisms that live in ponds and feed on the blood of fish and other animals. They produce enzymes which cause the animal on which they feed to continue bleeding even after the leech is done feeding. What type of relationship does this describe?

Aphids are tiny insects that live on and eat the leaves of plants, removing vital nutrients from the plants.

What is the carrying capacity of the graph?

What happens if a population grows past its carrying capacity?

This may cause a population to increase

The largest number of individuals that an environment can support long term is...

When death rate is equal to birth rate...

The ecological role an organism performs in their specific environment is considered the organism's...

Which organism in the table above is most likely a primary consumer? (Hint: Think about an energy pyramid)

Which organisms in the table above are most likely carnivores? (Select all that apply)

(Hint: Think about an energy pyramid)

Which organisms in the table above are most likely autotrophs/producers? (Hint: Think about an energy pyramid)

Use the graph above to answer the following question. What happened to the moose population as a result of the wolves being over-hunted in 1980?

Use the graph above to answer the following question. What is the most likely effect on the grass population size as a result of the wolf population changes during 1970-1980?

Which organism in the food web above is an omnivore?

Tigers live independently and require a large area for hunting. What effect would developing housing districts in these areas have on the tigers?

Eugene was observing wildlife on along the side of a busy street. He noticed that a group of vultures were eating the remains of a possum that had been run over. What type of consumer are the vultures?

Vegetation (plant life) in the tropical rainforest is so dense that very little sunlight reaches the forest floor. What type of relationship would the different trees in the forest share as a result of the limited sunlight?

Which of the following would be an example of a predator adaptation?

What student observation below could be classified as describing a population?

Some bacteria and mammals have a mutualistic relationship. This is a type of relationship where both members benefit. With which of the following does some bacteria help mammals?

Human pollution of oceans threatens the growth of algae and other protists that live there. The loss of these microscopic ogranisms most likely affects the health of the environment and its ability to support life because these organisms-

Which of the following describes a difference between primary and secondary succession?

A lichen is composed of two organisms, a fungus and a cyanobacterium. The fungus provides a growing surface, moisture, and nutrients to the cyanobacterium. the cyanobacterium provides food to the fungus. This relationship is considered to be an example of which of the following?

A non-native species is more likely to survive than a native species in an ecosystem because the non-native species has no natural enemies in the ecosystem.

The Indian leaf butterfly has traits that allow it to resemble a leaf. The bright colors of the monarch butterfly indicate that the butterfly tastes bad and can be poisonous. How does the appearance of these butterflies help them survive?

Usually, energy pyramids show that higher trophic levels tend to be made up of a smaller number of individuals. In which of the following examples is the higher trophic level made up of a greater number of individuals?

Which of the following is likely to occur as a result of using nitrogen containing fertilizer?

As part of the nitrogen cycle, animals acquire some amino acids by eating plants.

Removing the bottom of the food chain first (autotrophs), will cause the most instability in an ecosystem.

At a wild animal reserve in Africa, the acacia trees have been infected b a wood-boring beetle. In order to protect the trees, which provide food for the giraffe, the ecological manger sprays the trees with an insecticide to curb the damage to the trees. The insecticide will most affect the ecosystem stability by-

Less carbon dioxide would be dissolved in the ocean because increasing atmospheric temperature would cause ocean temperatures to increase.

Which of the following will increase the rate at which carbon dioxide is being added to the Earth's atmosphere?

Some species of fungi, protists, and bacteria play a vital role in every biogeochemcial cycle, including the carbon and nitrogen cycles. Which best identifies their common role?

A food chain contains oak trees (producer), mice (herbivore), black rat snakes (carnivore), and bald eagles (carnivore). If these organisms were placed in an energy pyramid, which organism would be in the energy level with the second-most amount of energy available?

Mesquite trees are common to the desert southwest. The have developed root systems that reach from 150-200 feet beneath the surface. How are deep roots an adaptation for surviving in desert ecosystem?

A tapeworm and dog is an example of a parasitic relationship.

What is the term for a symbiotic relationship between two organisms, in which both organisms benefit from the relationship?

When primary succession occurs on a moraine, which life-forms will help create the soil by breaking down bare rock?

Which of the following lists the order of biological organization form smallest to largest that the students can expect to find at the pond?

Bacteria in soil converts nitrogen from the air and decaying biotic material into nitrates that are used by plants to produce protein. How does this process benefit the ecosystem?

A population describes all the organisms of a particular species living in a given area.