Food Chains and Food Webs Quiz

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Questions and Answers

What is the primary role of producers in a food chain?

  • They compete for resources
  • They produce energy through photosynthesis (correct)
  • They consume other organisms
  • They decompose organic matter

A primary consumer feeds on producers.

True (A)

What is a food web?

A complex network of feeding relationships among various organisms in an ecosystem.

The _____ consumer is the first consumer in the food chain.

<p>primary</p> Signup and view all the answers

Match the organism to its respective trophic level:

<p>Caterpillar = Primary consumer Finch = Secondary consumer Owl = Tertiary consumer Grass = Producer</p> Signup and view all the answers

Which of the following organisms is a secondary consumer in the food chain where the kingfisher is a secondary consumer?

<p>Cricket (A)</p> Signup and view all the answers

Duckweed serves as a consumer in the river ecosystem.

<p>False (B)</p> Signup and view all the answers

Which of the following organisms is a primary consumer in the food chain?

<p>Grasshopper (B)</p> Signup and view all the answers

A producer is an organism that cannot make its own food and must consume other organisms.

<p>False (B)</p> Signup and view all the answers

What type of organisms do red fins eat?

<p>Mayflies, yabbies, worms</p> Signup and view all the answers

What role do detritivores and decomposers play in the food chain?

<p>They break down dead organisms and return nutrients to the ecosystem.</p> Signup and view all the answers

In a desert ecosystem, crickets primarily eat _______.

<p>cacti</p> Signup and view all the answers

Food chains show feeding relationships between organisms and arrows are used to show the flow of the ______ through an ecosystem.

<p>energy</p> Signup and view all the answers

Match the following organisms with their roles in the food chain:

<p>Grass = Producer Kingfisher = Tertiary consumer Cricket = Primary consumer Heron = Top predator</p> Signup and view all the answers

Match the following organisms with their correct classification:

<p>Grass = Producer Grasshopper = Primary Consumer Snake = Secondary Consumer Eagle = Top Carnivore</p> Signup and view all the answers

What would likely happen to the population of flat winkles if the crab population suddenly decreased?

<p>It would increase. (A)</p> Signup and view all the answers

If algae population increases, the seal population will remain unchanged.

<p>False (B)</p> Signup and view all the answers

Name one secondary consumer in the described food web.

<p>Fox or Cobra</p> Signup and view all the answers

If the field mice died, the number of ______ would likely decrease.

<p>Cobras</p> Signup and view all the answers

Match the following organisms with their roles in the food web:

<p>Grass = Producer Field mouse = Primary consumer Fox = Secondary consumer Wheat = Producer</p> Signup and view all the answers

What is the effect of parasitism on the host organism?

<p>It harms the host. (B)</p> Signup and view all the answers

Ectoparasites live inside the host organism.

<p>False (B)</p> Signup and view all the answers

What is an example of an ectoparasite?

<p>Tick or mistletoe</p> Signup and view all the answers

The _____ is the organism that benefits from parasitism.

<p>parasite</p> Signup and view all the answers

Match the type of parasite with its description:

<p>Ectoparasites = Live on or outside the host Endoparasites = Live inside the host Mistletoe = A parasitic plant that takes nutrients from the host Roundworm = A type of worm that can infect various animals and humans</p> Signup and view all the answers

Which of the following describes the roundworm Ascaris lumbricoides?

<p>It infects humans via the fecal-oral route. (A)</p> Signup and view all the answers

Nearly one-sixth of the human population has been infected by roundworms at some point.

<p>True (A)</p> Signup and view all the answers

How do roundworms typically infect a new human host?

<p>By ingestion of contaminated food or water</p> Signup and view all the answers

Parasitism typically results in a _____ for the host organism.

<p>negative effect</p> Signup and view all the answers

What is the typical outcome for the host in a parasitic relationship?

<p>The host's lifespan may be shortened. (D)</p> Signup and view all the answers

What type of relationship is parasitism?

<p>A relationship in which one species benefits at the expense of the other (B)</p> Signup and view all the answers

All ectoparasites live their entire lives on their host without leaving.

<p>False (B)</p> Signup and view all the answers

What is the primary mode of feeding for roundworms and tapeworms?

<p>They consume the host's partly digested food.</p> Signup and view all the answers

Lice can be treated with special _____ and lice combs.

<p>shampoo</p> Signup and view all the answers

Match the type of parasite with its description:

<p>Fleas = Live on the host all their lives Ticks = Feed at specific times and then leave the host Leeches = Attach to the skin and consume blood Plasmodium Falciparum = Causes malaria and is spread by mosquitos</p> Signup and view all the answers

Which of the following is an example of commensalism?

<p>A bird nesting in a tree hollow (C)</p> Signup and view all the answers

Endoparasites live on the outside of their host.

<p>False (B)</p> Signup and view all the answers

What is the typical effect of parasites on their hosts?

<p>They deprive the host of nutrients.</p> Signup and view all the answers

The larvae of parasites can be _____, allowing them to re-enter the host's gut.

<p>coughed up</p> Signup and view all the answers

Which organism is commonly known to cause athlete's foot?

<p>Fungi (B)</p> Signup and view all the answers

Flashcards

Food Chain

A diagram that shows the feeding relationships between organisms and the flow of energy in an ecosystem.

Producer

An organism that makes its own food using energy from the sun, typically through photosynthesis.

Consumer

An organism that gets its energy by eating other organisms (or producers).

Primary Consumer

The first consumer in a food chain, feeding on the producers.

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Secondary Consumer

A consumer that eats primary consumers.

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Tertiary Consumer

A consumer that eats secondary consumers.

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Top Carnivore

The animal at the top of a food chain, with no natural predators.

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Trophic Level

The position of an organism in a food chain, representing its feeding level.

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Herbivore

An animal that only eats plants.

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Carnivore

An animal that eats other animals.

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Omnivore

An animal that eats both plants and animals.

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Predator

An animal that hunts and kills other animals for food.

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Prey

An animal that is hunted and killed by another animal for food.

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Detritivores/Decomposers

Organisms that feed on dead organic matter, breaking it down.

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Food Chain

A linear sequence of organisms where each organism eats the one below it, showing the flow of energy.

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Trophic Level

An organism's position in a food chain, indicating its feeding habits.

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Producer

An organism that produces its own food, typically plants or algae using sunlight.

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Primary Consumer

An organism that eats the producer.

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Secondary Consumer

An organism that eats the primary consumer.

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Tertiary Consumer

An organism that eats the secondary consumer.

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Quaternary Consumer

An organism that eats the tertiary consumer.

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Food Web

A complex network of interconnected food chains, showing multiple feeding relationships.

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Autotroph

An organism that makes its own food.

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Heterotroph

An organism that eats other organisms for energy.

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Photosynthesis

The process plants use to convert sunlight into energy to make food.

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Herbivore

An animal that eats plants.

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Omnivore

An animal that eats both plants and animals

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Food Web

A network of interconnected food chains showing the flow of energy and nutrients in an ecosystem.

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Food Chain

A linear sequence where energy transfers from one organism to the next (e.g., grass -> rabbit -> fox).

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Producer

An organism that makes its own food (e.g., plants like grass).

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Primary Consumer

An animal that eats producers (e.g., rabbits eating grass).

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Secondary Consumer

An animal that eats primary consumers (e.g., foxes eating rabbits).

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Herbivore

An animal that eats plants.

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Carnivore

An animal that eats other animals.

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Omnivore

An animal that eats both plants and animals.

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Population Decrease (e.g., crabs)

A reduction in the number of individuals in a species within an ecosystem.

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Population Increase (e.g., flat winkles)

An increase in the number of individuals. Increased food supply.

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Food Web disruption

An alteration in the flow of energy and nutrient in an ecosystem resulting from the removal of a species or change in food availability

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Overfishing

The removal of fish from the ocean at a rate faster than they can reproduce and replenish.

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Cricket food

Animals that eat crickets include lizards, cats, and kingfishers.

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River producer

Duckweed is the producer in a river food web.

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Redfin food

Redfin fish eat mayflies, yabbies, and worms.

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Kingfisher (level 3) food chain

Grass -> cricket -> kingfisher

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Kingfisher (level 4) food chain

Duckweed -> mayfly -> redfin -> kingfisher

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Producer (pond)

Algae is a producer in a pond ecosystem.

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Pond consumer (carp)

Carp consume algae/waterweed in a pond.

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Pond consumer (trout)

Trout consume carp in a pond ecosystem.

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Desert Producer (1)

Grasses and cacti are producers in the desert.

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Desert Producer (2)

Grasses and cacti are producers in a desert.

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Desert Consumer (crickets)

Crickets consume cacti in a desert ecosystem.

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Desert consumer (mice)

Mice consume grasses in a desert food web.

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Desert consumer (bats)

Bats consume mice and crickets in the desert.

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Desert consumer (hawks)

Hawks consume mice and bats in a desert ecosystem.

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Tadpole food

Tadpoles consume algae in a pond ecosystem.

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Crowfish food

Crowfish consume algae in a pond ecosystem.

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Dragonfly larvae food

Dragonfly larvae eat tadpoles and crowfish.

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Blue fish food

Blue fish eat crowfish and dragonfly larvae.

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Spikefish food

Spikefish prey on crowfish and bluefish

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Heron food

Herons eat all types of fish.

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Leaf-eating insect food

Leaf-eating insects feed on Eucalyptus leaves.

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Sap-sucking insects food

Sap-sucking insects eat Eucalyptus tree sap.

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Starling food

Starlings eat both leaf-eating and sap-sucking insects.

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Goshawk food source

Goshawks prey on starlings.

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Spider food source

Spiders in trees feed on wasps and insects.

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Parasitism

One species (parasite) benefits, while the other (host) is harmed in an ongoing relationship.

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Parasite

An organism that benefits from and harms a host.

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Host

An organism that is harmed by a parasite.

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Ectoparasite

A parasite that lives on the outside of its host.

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Endoparasite

A parasite that lives inside its host.

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Mistletoe

A plant parasite that connects to its host plant to obtain resources.

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Roundworm (Ascaris lumbricoides)

A common parasitic worm infecting humans through the fecal-oral route.

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Endoparasite

A parasite that lives inside its host's body.

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Ectoparasite

A parasite that lives on the outside of its host's body.

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Parasitism

A symbiotic relationship where one organism benefits and the other is harmed.

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Commensalism

A symbiotic relationship where one organism benefits, and the other is neither helped nor harmed.

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Roundworm life cycle

Larvae are coughed up, swallowed, travel to the intestines, mature into adult worms, and produce eggs, restarting the cycle.

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Roundworm habitat

Found in mammal gut.

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Tick parasite

Feeds on host's skin and fur; can transmit disease.

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Lice

External parasites affecting humans (body, head, pubic).

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Fleas

External parasite that lives on hosts (e.g. dogs), biting and sucking blood.

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Leeches

External parasites that attach to hosts and feed on blood until engorged.

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Malaria

A disease caused by the parasite Plasmodium falciparum, transmitted primarily by mosquitos.

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Study Notes

Food Chains and Food Webs

  • Food chains show feeding relationships and energy flow in an ecosystem.
  • Arrows indicate the direction of energy transfer.
  • Food chains begin with autotrophs (producers) such as plants, algae, or seaweed that use sunlight for photosynthesis to make their own food.
  • Heterotrophs (consumers) eat other organisms for energy. Primary consumers eat producers, secondary consumers eat primary consumers, and so on.
  • Tertiary and sometimes quaternary consumers are higher in the food chain.
  • Food webs represent multiple interconnected food chains.
  • Animals often eat more than one type of organism, making part of multiple food chains.
  • Food availability may vary throughout the year (seasonal changes) which makes food webs more complex.
  • Food webs better represent feeding relationships in an ecosystem than simple food chains.

Trophic Levels

  • Trophic levels represent different feeding positions in a food chain or web.
  • Trophic level 1 is always the producer.
  • Subsequent levels show various consumers, with the highest level typically the top carnivore.
  • The position/level of an organism determines its role in the ecosystem.
  • Consumers gain energy from eating organisms at the lower trophic level or trophic levels.
  • Organisms at higher trophic levels generally get less energy.

Energy Transfer in Food Chains/Webs

  • Energy is lost at each trophic level (typically about 90%).
  • Energy is used by organisms for life processes like movement and reproduction.
  • Lost energy is not completely lost; decomposers break down organic matter and recycling nutrients.
  • An organism isn't 100% effective at capturing all available energy.
  • There is more prey than predators in a food chain due to energy loss along the chain.
  • Not all parts of an organism are edible or digestible. Some matter that is not eaten and digested is also lost for the next consumer.
  • Waste products (feces, urine) are another form of energy loss.

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