Abiotic/Biotic Factors
Carrying Capacity
Food Webs
Symbiotic Relationships
Trophic Levels
100
What is an ecosystem?
The living and nonliving parts of the environment.
100
Why did the graph stop increasing? what is the point at which the population stopped growing called?
The population stopped increasing because it hit the carrying capacity which means there are not enough resources to keep that many individuals alive.
100
What do the arrows on a food web show us?
They show us who eats who and how the energy is moving throughout an ecosystem.
100
What is Commensalism? give an example
Commensalism is when one organism benefits and the other is unbothered
ex. whale and barnacles
100
Which level has the most energy and the highest population size?
Producers/plants
200
What is a biome? List at least 3 examples.
A biome is a large naturally occurring community of plants and animals occupying the same major habitat. Some examples of biomes include... Artic tundra, desert, grasslands, tropical rainforest, grasslands, savanna, freshwater (lakes/ponds/rivers), Marine (ocean)
200
What are limiting factors?
limiting factors are resources that prevent (stop) the population from increasing/ growing.
200
Who is competing in this food web?
The penguin and the elephant seal over squid
The fish and the blue whale over krill
200
What is mutualism?
give an example.
Mutualism is when both organisms benefit.
ex. bee and flower
200
What do decomposers do?
Decomposers break down dead plants and animals. Some examples of decomposers are bacteria and fungi.
300
What is the difference between Abiotic and Biotic factors? List some examples of each.
Abiotic factors are the nonliving parts of the environment (sunlight, water, rocks, soil, air).
Biotic factors are the living parts of the environment (plants, animals, fungi, bacteria).
300
What is the carrying capacity on this graph?
The carrying capacity is at about 1.6 million
300
Who is a producer on this food web?
The plant/blueberry bush
300
What is parasitism? give an example
Parasitism is when one organism benefits and the other is harmed.
ex. human and mosquito
300
What is the difference between a producer and a consumer?
Producers make their own food while Consumers have to eat another organism to get food/energy
400
Abiotic factors that could affect the stability of an ecosystem could include:
A. hurricanes, packs of wolves, and temperature
B. blizzards, heat waves, and swarms of grasshoppers
C. droughts, floods, and heat waves
D. species of fish, number of decomposers, and supply of algae
C. droughts, floods, and heat waves
*this is the only option that does not contain any living or biotic factors
400
What are some examples of limiting factors that could decrease the population?
- Availability of food and water
- how much space/habitat is available
-how many mates are available
- natural disasters(volcanoes, earthquakes, floods)
- disease/illness
400
Which of the following organisms compete for the mouse as a food source?
A. hawk and snake
B. snake and kinglet
C. oak tree and pine tree
D. pine borer and salamander
the hawk and the snake
400
What is competition?
give an example.
Fighting over resources.
fighting over food, a mate, territory
400
What is an apex predator?
the top of the food chain, nothing is capable of eating them
500
What is an invasive species?
Give an example of one and how it damaged the environment.
An invasive species is a species that is not native to an area and was usually placed there by humans.
some examples we discussed/read about in class include...
- Asian long horned beetle destroying trees
- lionfish (take resources from native fish)
-pet snakes in the Florida everglades (take habitat and resources away from native organisms)
- zebra mussels (take resources from other organisms)
500
In a population of rodents, birth rate plus immigration rate is greater than death rate plus emigration rate. Which of the following occurs under these conditions?
A. The size of the population always increases.
B. The size of the population always decreases.
C. The size of the population never changes.
D. The size of the population never reaches its carrying capacity
A. The size of the population always increases.
500
Which of the following will most likely happen if the frog population decreases?
A. Owls will have no source of food.
B. The snake population will increase.
C. Birds will have less competition for food.
D. The grasshopper population will go extinct.
C. Birds will have less competition for food.
500
Tapeworms are sometimes found in the small intestines of sheep. A tapeworm attaches to the intestinal wall using suckers and then absorbs nutrients from the sheep’s intestine.
Which of the following terms describes the relationship between the tapeworm and the sheep?
A. competition
B. herbivory
C. parasitism
D. predation
C. parasitism
500
Which of the following energy pyramids shows the correct placement of trophic levels?
A.