Which phrase best describes an ecosystem?

Which phrase best describes an ecosystem?

• Which phrase best describes an ecosystem?

• 1. all the living organisms in a specific location 2. all the nonliving materials in a specific location 3. some nonliving materials passing through living organism in a specific location 4. living organisms and nonliving materials interacting in a specific location

1. Identify some biotic factors in the diagram.

• 1. Identify some biotic factors in the diagram.

• Deer, trees, frog, duck, plants

• 2. Identify some biotic factors in the diagram.

• Water, oxygen, soil

• 3. Identify what this diagram represents? Support your answer.

• An ecosystem because it contains biotic and abiotic factors.

Identify what is being described.

• Identify what is being described.

• One species living in the same area.

• The role an organism plays in its habitat.

• Only eat producers.

• Break down dead organisms.

• Hunt for their food.

• Organisms that consume both plants and animals.

• Consists of biotic and abiotic factors.

• Where an organism lives.

• Produce their own food.

• Many species living in the same area.

• Feed off of organisms that have already been killed.

algae→ minnow → lake trout → hawk

• algae→ minnow → lake trout → hawk

• Which organism has the greatest energy?

• Algae

• 2. Give one effect that an increase in the minnow population would have on the ecosystem.

• Decrease in algae, increase in lake trout

• 3. Why are the algae an important part of this food web?

• They use the sun to produce glucose that is passed through the food chain.

• 4. What do the arrows represent?

• Direction of energy

Which level would contain producer organisms? 

• Which level would contain producer organisms? 

• D

• 2. If birds eat insects that feed on corn, which level would birds occupy? 

• B

• 3. As one progresses from D to A, what happens to the amount of energy?

• It decreases because each level uses some of the energy or it lost as heat.

Which organisms would contain the greatest amount of available energy? 

• Which organisms would contain the greatest amount of available energy? 

• Grasses, shrubs

• 2. Which are the primary consumers?

• Rabbits, deer, seed-eating birds, rates

• 3. What organism is not included in this food web and is an essential part of the ecosystem?

• Decomposers

3. Why are decomposers are necessary in this food web?

• 3. Why are decomposers are necessary in this food web?

• They recycle nutrients back into the soil.

• 4. Identify an effect of a decrease in the wolf population.

• Decrease in deer

• Increase in grass

Identify the material cycle being described.

• Identify the material cycle being described.

• Involves condensation and evaporation.

• Involves photosynthesis and respiration.

• Important for the production of proteins.

• Involves the release of oxygen from plants and carbon dioxide from animals.

• Involves bacteria, plants, animals and decomposers.

• Involves precipitation, transpiration, photosynthesis and respiration.

Energy stored in organic molecules is passed from producers to consumers. This statement best describes an event in

• Energy stored in organic molecules is passed from producers to consumers. This statement best describes an event in

• 1. the process of photosynthesis. 2. natural selection. 3. a food chain. 4. ecological succession.

(1.) are unable to interbreed 

• (1.) are unable to interbreed 

• (2.) have a limited supply of food 

• (3.) share food with each other 

• (4.) have different ecological niches

Which material cycle relies least on the processes of photosynthesis, transpiration, evaporation, respiration, and condensation?

• Which material cycle relies least on the processes of photosynthesis, transpiration, evaporation, respiration, and condensation?

• 1. oxygen cycle     

• 2. water cycle 3. nitrogen cycle   

• 4. carbon cycle

Which is not recycled by the processes of photosynthesis and respiration? 

• Which is not recycled by the processes of photosynthesis and respiration? 

• C

• (2) N 

• (3) H 

• (4) O

(1.) cycling of materials 

• (1.) cycling of materials 

• (2.) limited resources 

• (3.) presence of decomposers 

• (4.) disease

(1.) mutualism

• (1.) mutualism

• (2.) decomposers

• (3.) commensalism

• (4.) parasitism

The symbiotic relationship between a human and the fungus that causes athlete's foot is an example of

• The symbiotic relationship between a human and the fungus that causes athlete's foot is an example of

• predation

• (2) commensalism

• (3) parasitism

• (4) decomposition

The relationship between fleas and a dog is most similar to the relationship between

• The relationship between fleas and a dog is most similar to the relationship between

• (1.) honeybees and flower 

• (2.) orchids and a tree 

• (3.) nitrogen-fixing bacteria and a legume

• (4.) athlete's foot fungus and a human

Bacteria of decay are important components of an ecosystem because they

• Bacteria of decay are important components of an ecosystem because they

• (1) recycle organic matter (2) are involved in photosynthesis (3) absorb solar energy (4) slow the spread of disease

(1) Commensalism (2) Mutualism (3) Parasitism (4) Decomposition (5) Prey-predator

• (1) Commensalism (2) Mutualism (3) Parasitism (4) Decomposition (5) Prey-predator

• The relationship between the crocodile and the leech

• Bacteria or fungi

• One organisms is benefits and the other is not affected

• Organisms hunt for animals as a source of food

• Both organisms benefit

• Involved in the recycling of materials back into the soil.

1. Which stage represents a pioneer community?

• 1. Which stage represents a pioneer community?

• B

• 2. Identify the process involving the replacement of stage B by stage C and the replacement of stage C by stage D in a particular location.

• Succession

• 3. Which stage would best represent a climax community?

• E

Which statement concerning the climax stage of an ecological succession is correct?

• Which statement concerning the climax stage of an ecological succession is correct?

• (1.) It is the first community to inhabit an area.  

• (2.) It consists entirely of plants.

• (3.) It persists until the environment changes. 

• (4.) It changes rapidly.

1. Identify the process represented in the diagram..

• 1. Identify the process represented in the diagram..

• Succession

• 2. What will this area most likely be if no human intervention or natural disaster occurs by the year 2050?

• Forest

Which would NOT be considered a renewable resource?

• Which would NOT be considered a renewable resource?

• (1.) coal 

• (2.) solar power 

• (3.) ocean waves 

• (4.) hydroelectric power

1. Which substance is the major cause of the loss of our stratospheric ozone shield?  

• 1. Which substance is the major cause of the loss of our stratospheric ozone shield?  

• (1.) CFC's  (2.) oxygen 

• (3.) acid rain  (4.) carbon dioxide

• 2. Give an example of a negative effect of ozone depletion.

• More UV radiation reaching Earth’s surface  increase in cancer, destruction of producers, eye damage

1. Which is NOT an expected effect of global warming? 

• 1. Which is NOT an expected effect of global warming? 

• (1.) Melting of polar ice caps.

• (2.) Flooding of coastal areas. 

• (3.) Increased crop yields. 

• (4.) Alteration of rainfall patterns

• 2. Identify two possible causes of global warming.

• Melting of polar ice caps  flooding

• Climate change

• Habitat destruction

There is ample evidence to suggest a direct relationship between global warming and increased 

• There is ample evidence to suggest a direct relationship between global warming and increased 

• (1.) ozone concentration 

• (2.) carbon dioxide concentration 

• (3.) acid rain

• (4.) CFC's

1. Deforestation will most directly result in an immediate increase in

• 1. Deforestation will most directly result in an immediate increase in

• (1) atmospheric carbon dioxide (2) atmospheric ozone (3) wildlife populations (4) renewable resources

• 2. What are some other negative effects of deforestation?

• Habitat destruction