Food Webs
Food Chains
Producers
Consumers
Feeding Relationships
100
What is a food web?
A model that shows the complex network of feeding relationships and the flow of energy within and sometimes beyond an ecosystem.
100
What is a food chain?
a sequence that links species by their feeding relationships.
100
In which trophic level are producers in?
First Trophic Level
100
Are humans primary, secondary, or tertiary consumers?
Humans fall under all three, as we are naturally omnivores, but others can be vegetarians, and such.
100
What two types of ecological relationships are there?
Symbiosis and predation.
200
Which type of organism is mostly responsible for the stability of a food web? A: Primary Consumers B: Decomposers C: Producers
c. producers.
200
Which of the following is most likely to be affected by change in availability of prey, a generalist, or a specialist?
A specialist because they only eat a certain type of organism. Generalists, unlike specialists, have a varying diet and can easily adapt to change in prey availability.
200
What is another word for producer?
Autotroph
200
What three types of consumers are there?
Herbivores, omnivores, and carnivores.
200
What are the three categories that fall under symbiosis?
Mutualism, commensalism, and parasitism.
300
A food web is more realistic than a food chain because A: It compares the number of consumers to the number of micro-organisms in an ecosystem. B: Food chains use only a small sampling of organisms C: A food web explains why there are more producers than consumers.
A: It compares the number of consumers to the number of micro-organisms in an ecosystem.
300
What is the difference between a food web and a food chain?.
a food web shows every potential relationship between species. A food chain on the other hand, only follows the connection between one producer and a single chain of consumers within an ecosystem.
300
The prokaryotes deep under water in the ocean use photosynthesis. True or False?
This is false because deep in the water, not enough sunlight is given to these prokaryotes to use photosynthesis. Instead, they use a process called chemosynthesis, which is when an organism forms carbohydrates using chemicals as an energy source.
300
What type of consumer would vegetarians be considered?
Vegetarians would be considered primary consumers.
300
What is the difference between parasitism and predation?
In predation, the prey gets quickly eaten by its prey. On the other hand the parasite benefits by keeping its prey alive for days or years.
400
Tertiary consumers receive 10% of the energy from the sun. True or False?
false, they receive 0.1% of the energy from the sun. Producers receive 100% of energy, primary consumers then get 90% less energy which is 10%, then secondary consumers only receive 1%. Due to this rule, tertiary consumers will only receive 0.1% of energy from the sun.
400
In the following food chain, which is the secondary consumer? Grass---> Grasshopper---> Frog---> Snake
The frog will be considered the secondary consumer.
400
Why would there need to be a greater population of producers instead of consumers?
Producers support the whole ecosystem, the consumers receive the energy off of them.
400
Which of the following will receive the most energy? A: Primary Consumer B: Secondary Consumer C: Tertiary Consumer
A: Primary Consumer
400
What would lice on your hair be an example of?
Parasitism
500
What happens to the 90% of energy that is reduced in a food web?
It is dissipated into the environment.
500
What is a trophic level?
The position occupied by an organism in the food chain?
500
What would happen to an ecosystem without producers?
The ecosystem wouldn't even exist. Every organism that isn't a producer needs producers to receive energy.
500
What is another word for consumers?
Heterotroph
500
Which of the following is NOT an example of a symbiotic relationship? A: A mother bear caring for her cub B: Microscopic mites living in the hair follicles of our eyelashes C: The bracanoid wasp laying its eggs inside a caterpillar
A: A mother bear caring for her cub.
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