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Ecological Interactions and Niche Differentiation Quiz

#1

Which of the following is an example of mutualism?

Bee pollinating a flower
Explanation

Mutualism is a symbiotic relationship where both species benefit.

#2

What term describes the role a species plays in its ecosystem?

Niche
Explanation

Niche refers to the ecological role of a species within its environment.

#3

Which of the following is an example of a predator-prey relationship?

Lion and zebra
Explanation

Predator-prey relationship involves one species hunting and consuming another for food.

#4

What is the term for the evolutionary process where unrelated species develop similar traits due to similar environmental pressures?

Convergent evolution
Explanation

Convergent evolution leads to unrelated species developing similar characteristics due to similar environmental challenges.

#5

Which of the following is an example of a biotic factor?

Predator
Explanation

Biotic factors are living components of an ecosystem, like predators, prey, and competitors.

#6

What term refers to the range of conditions a species can tolerate and the range of resources it can use?

Niche
Explanation

Niche encompasses the environmental conditions and resources a species can exploit within its habitat.

#7

Which of the following is an example of a decomposer?

Earthworm
Explanation

Decomposers break down organic matter into simpler substances, facilitating nutrient recycling in ecosystems.

#8

Which type of ecological interaction involves one species benefiting while the other is unaffected?

Commensalism
Explanation

Commensalism is a relationship where one species benefits while the other is neither harmed nor helped.

#9

What is the process called when two species evolve in response to changes in each other over time?

Co-evolution
Explanation

Co-evolution is the evolutionary process where two species influence each other's development over time.

#10

Which of the following is an example of a keystone species?

Sea otter
Explanation

A keystone species has a disproportionately large impact on its ecosystem relative to its abundance.

#11

What happens during competitive exclusion?

Two species compete until one outcompetes and eliminates the other
Explanation

Competitive exclusion occurs when one species outcompetes another for resources, leading to the elimination of the less competitive species.

#12

Which of the following is an example of amensalism?

Bacteria secreting antibiotics
Explanation

Amensalism is a relationship where one organism is harmed while the other remains unaffected.

#13

What is the term for the range of conditions in which a species can survive and reproduce?

Fundamental niche
Explanation

Fundamental niche describes the full range of environmental conditions suitable for a species' survival and reproduction in the absence of competition.

#14

Which of the following is an example of an ectoparasite?

Lice
Explanation

Ectoparasites live on the external surface of their host organism, such as lice feeding on the skin and hair of mammals.

#15

In an ecosystem, how does niche differentiation contribute to biodiversity?

By allowing for the coexistence of multiple species
Explanation

Niche differentiation facilitates the coexistence of diverse species within an ecosystem.

#16

How does resource partitioning contribute to niche differentiation?

By allowing species to share resources and reduce competition
Explanation

Resource partitioning involves species dividing available resources to minimize competition and coexist in an ecosystem.

#17

How does character displacement contribute to niche differentiation?

By increasing competition between species
Explanation

Character displacement results in increased competition between species, leading to niche differentiation and reduced overlap in resource use.

#18

How does coevolution contribute to niche differentiation?

By allowing for the coexistence of multiple species
Explanation

Coevolution leads to the development of specialized relationships between species, facilitating their coexistence and niche differentiation.

#19

How does intraspecific competition contribute to niche differentiation?

By reducing competition within species
Explanation

Intraspecific competition reduces competition within a species, allowing individuals to specialize in different niches and coexist.

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