WorksheetsEcology 2
Total questions: 14
Worksheet time: 7mins
A hypothetical community on a barren mid-Atlantic island consists of two fish-eating seabirds (the booby and the noddy), the fungi and microorganisms that live on the birds' dung, a tick that feeds on these two birds, a cactus, a moth that feeds on cast-off feathers, a beetle that lives on dung organisms, and spiders that eat the other arthropods. There are no other plants and no lichens. Which of the following choices incorrectly pairs a member of this assemblage with its position in the trophic structure?
moth, detritivore
fungi, detritivores
cactus, producer
booby, primary consumer
In a hypothetical food chain consisting of grass, grasshoppers, sparrows, and hawks, the grasshoppers are
secondary producers.
primary producers.
secondary consumers
primary consumers.
On Earth, most organic molecules are produced by
cellular respiration.
photosynthesis.
hydrolysis.
glycolysis.
Within an ecosystem, a tree is a
producer.
primary consumer
detritivore
secondary consumer.
In addition to abiotic factors, community composition of plants can be severely compromised by
parasites and pathogens.
rapid coevolution.
non-native birds
introduction of chestnut trees.
The prokaryotes that cause tooth decay have a ________ relationship with humans.
predatory
competitive
mutualistic
parasitic
Most plants have a variety of chemicals, spines, and thorns because the plants
cannot run away from herbivores.
are camouflaged into their surroundings
are relying upon Batesian mimicry.
feed on the organisms that try to eat them.
If an overlap develops between the ranges of two closely related species, and if the species occupy the same niche in the zone of overlap, what will probably happen in the zone of overlap?
Both species will coexist, provided the environment in the zone of overlap is similar to that of one of the individual ranges.
One species will take over most or all of the zone of overlap.
Both species will coexist, provided the environment in the zone of overlap is different from that in either individual range.
A new species will arise by hybridization.
In an ecosystem, you would expect to find interspecific competition between
populations of two species that occupy the same niche.
two wasp species that mimic each other's appearance.
males and females of a species in which both sexes occupy the same niche
a prey species and its predator.
The sum total of a population's use of the biotic and abiotic resources of its habitat constitutes its
environment
range
evolution
niche
When a crocodile eats a fish, the interspecific interaction between the two could be expressed as ________ for the crocodile and ________ for the fish.
- . . . +
+ . . . -
+ . . . +
- . . . -
When two different populations in a community benefit from their relationship with each other, the result is called
benefism
competition
mutualism
parasitism
An owl and a hawk both eat mice. Which of these describes the relationship between a hawk and an owl?
predation
mutualism
parasitism
competition
A community is composed of
the factors that constitute an organism's niche.
potentially interacting populations of different kinds of organisms.
one species of organism living in a specific environment on Earth.
living organisms and their nonliving environment.
