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WorksheetsChapter 18: Ecology
Total questions: 15
Worksheet time: 8mins
The diagram below shows a carbon cycle in a habitat.
Which numbered arrows show where respiration takes place?
1, 2, 3 and 4
1, 2 and 3 only
1 and 4 only
2 and 3 only
The diagram shows a food web in woodland.
In this food web, a beetle is
a carnivore.
a decomposer.
a herbivore.
a producer.
The diagram below shows a pyramid of biomass.
Which of the following is NOT an explanation for the formation of the pyramid?
Some of the materials are lost when passing from one trophic level to another.
Not all materials in one trophic level are available to the next level.
The body sizes increase when going up the food chain.
The growth rates decrease when going up the food chain.
The diagram represents a pyramid of biomass within an ecosystem.
Which of the following options shows the direction of energy flow through the pyramid?
In a food chain, through which organisms does the least amount of energy flow?
Carnivores
Decomposers
Herbivores
Producers
The organism Leptomonas is a parasite of fleas. One flea may contain several thousand Leptomonas. A food chain containing Leptomonas is given below.
Which diagram represents a pyramid of numbers for this food chain?
The diagram below shows how waste products are removed from a frog’s body.
Which of the following will not be recycled and returned to the environment?
water
urea
heat
carbon dioxide
What role do earthworms play in the carbon cycle?
They break down complex carbon compounds from dead remains into simpler carbon compounds.
They generate carbon dioxide and carbon monoxide.
They break down carbon dioxide into organic carbon compounds.
They respire and hence, release carbon dioxide into the environment
Plants trap solar energy.
Which food chain passes on the largest proportion of this energy to humans?
beans-humans
corn-chicken-human
plankton-fish-human
seaweed-insects-fish-humans
What is the producer in the energy-flow diagram shown?
A
B
C
D
The diagram shows how carbon circulates in nature.
Through which stage does most energy flow?
A
B
C
D
The following diagram shows a food web.
Which one of the following are secondary consumers?
owl and badger
snake and badger
ladybird and shrew
aphid and caterpillar
The diagram shows four possible pathways for the transfer of energy from green plants to Man. Which pathway transfers the most energy to Man?
A
B
C
D
The diagram shows part of the carbon cycle.
Which labelled arrow represents photosynthesis?
A
B
C
D
A bird feeds on a population of insects. The insects feed on the leaves of a tree. Which of the following shows the pyramid of numbers for the food chain?
A
B
C
D
