Which of the following lists include only biotic parts of an ecosystem?
A(n) _____________ is all the living and nonliving things in a particular area that interact with one another.
In an ecosystem, a group of birds eat fruit from a tree. When the birds drop the fruit on the ground, the mice eat the fruit. Seeds are spread around the area by both the birds and mice and new trees grow. What level of organization is this an example of?
Which of the following correctly shows the organization in an ecosystem, from the smallest to the largest level?
Which of the following is NOT a characteristic of all living things?
Both a fast-moving stream and a dog respond to the environment and grow and develop, but this characteristic of life is why a dog is considered alive and a stream isn’t.
Animals in the highest trophic level of a food chain will often be the largest in body size but will be few in numbers. What accounts for the small numbers?
The energy passing from the detritivores to the predatory invertebrates in this food web is 14,000 kJ m/year. Approximately how much energy (in kJ m/year) passes from the predatory invertebrates to the carnivores?
The energy passing from the detritivores to the predatory invertebrates in this food web is 14,000 kJ m/year. Approximately how much energy (in kJ m year) passes from the primary producers to the detritivores?
Which represents a correct food chain from this web?
Which term best defines a group of populations living and interacting with each other in an area?
Which of the following ecological units includes abiotic factors?
Which of the following is true about secondary consumers in an ecosystem?
Which of the following organisms is most likely to be located at the apex of the pyramid of biomass?
All of the following statements about the diagram below are correct EXCEPT:
Which of the following organisms in the diagram above most likely has the largest biomass?
Which law of thermodynamics explains why energy is lost to the environment at each trophic level?
Which law of thermodynamics explains why the amount of energy is the same at each trophic level but it may be in different forms.
Which law of thermodynamics explains that energy cannot be created or destroyed, but converted from one form to another?
The Venus flytrap (Dionaea muscipula) is a photosynthetic plant. It obtains nitrogen but not energy by digesting captured insects. Which term describes this plant?
The three-toed sloth, Bradypus variegatus, lives in tree tops where it feeds on leaves. It also feeds on algae and fungi which live in its fur. In which trophic group should the three-toed sloth be classified?
Over time, the hull of a sunken ship may become colonized by a wide range of marine organisms. What term is used to describe all of the organisms living in and on a sunken ship?
Which level(s) of ecological complexity involve(s) biotic factors but not abiotic factors?
I. Community
II. Ecosystem
III. Population
Which of the following molecules do plants need to carry out photosynthesis?
I. H2O
II.CO2
III. C6H12O6
Where does chemosynthesis primarily occur?
Which organisms typically perform chemosynthesis?
What do chemosynthetic organisms use to produce food?
What is the primary purpose of photosynthesis in plants?
What role do herbivores play in the food web?
Which statement best describes a trophic level in an ecosystem?
What do arrows in a food web represent?
The picture below shows an energy pyramid.
What will most likely happen to the foxes and the wolves if the rabbits are removed?
The picture below shows an ocean bay food chain.
Sea otters move into the ocean bay. They eat all the sea urchins. This change will cause the
A marine food web is shown in the diagram below.
Which organism below belongs in level 3 of this marine food web?
A marine food web is shown below.
Which chart correctly shows three of the organisms according to their roles in cycling matter in the marine food web?
The picture below shows the energy flow through a meadow community.
Which of the following would most likely occur to the populations within the community of organisms immediately after a wildfire burns the environment?
Which statement best describes what will happen if the population of herbivores in the community decreases?
Which statement best describes the flow of energy as it passes through the organisms in the pyramid?
The diagram below shows a simple food web.
Which animal is classified as an omnivore?
Which of the following animals might compete with the coyote in this food chain?
Decomposers are important in the food chain because they
The diagram below shows a marine food chain.
The zooplankton in this food chain are
The table below contains information about animal diets.
Which energy pyramid best represents the data in the table?
A forest-ecosystem food web is shown below.
If additional wrens are introduced into this ecosystem, there will most likely be an immediate decrease in the
A food chain is shown below.
Grasses → Crickets → Field Mice → Hawks
For the food chain shown, which of the following changes would have the most severe consequences?
A group of organisms that interact with and depend upon one another is called a community. The movement of matter and energy through a community can be studied by examining its food web. As organisms eat other organisms, energy and nutrients pass through various feeding levels. These feeding levels are called trophic levels. The following is a diagram of the energy and nutrient flow through a simple community.
Which group would most likely contain living algae?
What is the source of energy for the algae?
Ecosystems are composed of all living and nonliving components in an area. Food webs show the flow of nutrients and energy within an ecosystem.
Use the food web to answer the following questions.
Suppose that a new predator of the rabbit migrated to this ecosystem. What is the most likely initial effect on the other organisms?
Which one of the following is true of grass in an ecosystem?
Interactions in an ecosystem result from the transfer of matter and energy from producers to consumers and eventually to decomposers. What are the forms of energy transfer from #1 → #4?
How would the removal of earthworms from the food chain affect the other organisms?
A student examines the information in the table. The student concludes that Organism W should be placed at the base of the food web, to represent the feeding relationships in the marine ecosystem. However, the student later learns that Organism W’s cells do not contain chloroplasts.
Which conclusion would be appropriate, based on the new information?
Wolves get energy from eating rabbits. Rabbits get energy from eating grass. The grass makes its own food energy. If lots of the wolves were killed, then
In ecosystems, the sun’s energy is transferred through food webs as shown below.
The sun’s energy is most directly available to people through
We get energy from the food we eat. The energy in the food first comes from the
Use the diagram below to answer the question.
In this energy pyramid, which organism would most likely be in level 2?
Use the diagram below to answer the question.
Which group of organisms is not represented in the diagram above of a simple food web?
Use the food chain below to answer the following question.
What do the arrows in the food chain indicate about the flow of energy in an ecosystem?
In testing the effect of light on plant growth, what variable is controlled?
