An energy pyramid consists of three trophic levels. The carnivores in the top trophic levels require 5,000 kcalories per day.

How many kcalories per day do the producers need to provide for the carnivores to reach their requirement?

A disease has greatly reduced the number of night snakes present in a desert ecosystem.

Which population would increase as a direct result of the decrease int he night snake population?

What is the substance that is being recycled in this model?

An example of a biotic factor is

What nutrient does the above picture depict?

Where does all the energy in an ecosystem ultimately come from?

What is the percentage of energy that is lost from one trophic level to the next?

Why do all of the arrows point at the fungus in the food chain?

Which organism receives the least amount of energy from it's food source?

What would happened to the Edith's Checkerspot moth population if the raven population decreases?

This process pulls carbon dioxide from the atmosphere to make food/sugar for plants

Which organism returns fixed nitrogen back into the atmosphere in the form of N2?

Precipitation can only fall as liquid water.

refers to behaviour by an individual that increases the fitness of another individual while decreasing the fitness of the actor

Carbon dioxide is a type of ______________________ gas that traps heat in the atmosphere.

In the forests of Patagonia, a hummingbird species called Sephanoides sephanoides pollinates on its own nearly 20% of the local woody flora. In fact, many plants in the area can only be pollinated by hummingbirds. If these birds disappeared, the diversity of vegetation would decline and some species would possibly go extinct.

This is an example of a

A certain species of wasp is the only pollinator for a certain species of plant. The plant is the only source of food and shelter for the wasp. The graph shows the plant and wasp populations trends.

Which will most likely happen to the plant population if an introduced disease kills all the wasps in a short period of time?

A certain butterfly lives in only one type of habitat. The graphs show changes in the size of this butterfly population and the amount of its habitat during the last century.

In 2001, ecologist began restoring areas of the butterfly's habitat. If the habitat restoration continues, which of these will most likely happen to the butterfly population?

What is A?

what is B?

what is c?

what is D?

what is E

what is F?

what is A

what is B

what is C

what is D

what is E

what is F

This forms when carbon gets buried miles underground for millions and millions of years

What is the first step in the nitrogen cycle, in which gaseous nitrogen is converted into ammonia?

Which organisms are most critical in the nitrogen cycle?

A threatening behavior that one animal uses to gain control over another animal

Instinctive behavior that is programmed by the genes

A form of learning in which a newly born animal forms a permanent bond to the first moving object it see.

Signals (visual displays, sounds) produced by one animal that result in some type of response in another animal.

Each time a dolphin in a marine mammal show balances a ball on its nose, it receives a fish reward is an example of?