Everyday Science

Ecology and Ecosystems MCQs with Answers

Welcome to the Ecology and Ecosystems MCQs with Answers. In this post, we are sharing Ecology and Ecosystems Multiple Choice Questions and Answers in Everyday Science section for various competitive exams in Pakistan. Each question offers a chance to enhance your knowledge regarding Ecology and Ecosystems online MCQs Test.

What is the term for a group of organisms of the same species living in a specific area?
A) Population
B) Community
C) Ecosystem
D) Biome

Which of the following is an example of an abiotic factor in an ecosystem?
A) Temperature
B) Plants
C) Animals
D) Decomposers

What do we call the role or function of a species within an ecosystem?
A) Niche
B) Habitat
C) Biome
D) Trophic level

Which of the following is a primary producer in most ecosystems?
A) Plants
B) Herbivores
C) Carnivores
D) Decomposers

What term is used to describe the relationship between two species in which both benefit?
A) Mutualism
B) Commensalism
C) Parasitism
D) Predation

In a food chain, which organism is typically at the highest trophic level?
A) Apex predator
B) Primary producer
C) Herbivore
D) Decomposer

What is the process by which plants convert sunlight into chemical energy?
A) Photosynthesis
B) Respiration
C) Decomposition
D) Nitrogen fixation

What is the term for an organism that feeds on dead or decaying matter?
A) Decomposer
B) Herbivore
C) Carnivore
D) Omnivore

Which of the following is an example of a keystone species?
A) Wolves in Yellowstone
B) Grass in a savanna
C) Plankton in the ocean
D) Algae in a pond

What type of ecosystem is characterized by water with a high salt concentration?
A) Marine
B) Freshwater
C) Desert
D) Tundra

Which of the following processes is responsible for the movement of carbon between the atmosphere and organisms?
A) Carbon cycle
B) Water cycle
C) Nitrogen cycle
D) Phosphorus cycle

Which of the following is an example of a secondary consumer?
A) Snake
B) Grasshopper
C) Grass
D) Fungus

What is the term for a species that is not native to an ecosystem and may cause harm?
A) Invasive species
B) Keystone species
C) Endemic species
D) Indicator species

Which term refers to a region where freshwater and saltwater mix?
A) Estuary
B) Pond
C) River
D) Wetland

Which type of symbiotic relationship benefits one species while the other is neither helped nor harmed?
A) Commensalism
B) Mutualism
C) Parasitism
D) Predation

In which biome would you most likely find permafrost?
A) Tundra
B) Tropical rainforest
C) Savanna
D) Desert

Which cycle involves the conversion of nitrogen gas into forms usable by living organisms?
A) Nitrogen cycle
B) Carbon cycle
C) Water cycle
D) Phosphorus cycle

What is the term for the maximum number of individuals that an environment can support?
A) Carrying capacity
B) Niche capacity
C) Limiting factor
D) Growth rate

Which of the following organisms is a herbivore?
A) Deer
B) Lion
C) Hawk
D) Spider

What is the process of water moving from the ground into the atmosphere?
A) Evaporation
B) Precipitation
C) Condensation
D) Respiration

Which term describes a relationship where one organism lives off another, causing harm to the host?
A) Parasitism
B) Mutualism
C) Commensalism
D) Herbivory

Which of the following is an example of an autotroph?
A) Algae
B) Tiger
C) Mushroom
D) Eagle

What is the role of decomposers in an ecosystem?
A) Breaking down dead organisms
B) Producing oxygen
C) Pollinating plants
D) Preying on herbivores

Which of the following organisms is an apex predator?
A) Lion
B) Rabbit
C) Cow
D) Grass

What type of succession occurs in an area where no soil or living organisms previously existed?
A) Primary succession
B) Secondary succession
C) Tertiary succession
D) Climax succession

Which of the following describes a climax community?
A) A stable and mature ecosystem
B) The beginning of an ecosystem
C) An area undergoing disturbance
D) A temporary ecosystem

What is the term for organisms that eat both plants and animals?
A) Omnivores
B) Herbivores
C) Carnivores
D) Detritivores

What type of ecosystem exists in tropical regions with heavy rainfall and dense vegetation?
A) Rainforest
B) Desert
C) Tundra
D) Grassland

Which of the following is considered a limiting factor for population growth?
A) Food availability
B) Birth rate
C) Energy flow
D) Climate change

What is the process by which nitrogen is returned to the atmosphere from the soil?
A) Denitrification
B) Nitrogen fixation
C) Photosynthesis
D) Decomposition

Which of the following describes an ecosystem?
A) A community of living organisms interacting with their physical environment
B) A single species living in an area
C) Only the non-living components of an area
D) A group of ecosystems with similar climates

What is the term for species that indicate the health of an ecosystem?
A) Indicator species
B) Keystone species
C) Invasive species
D) Endangered species

Which of the following describes biomagnification?
A) Increase in concentration of toxic substances in higher trophic levels
B) Increase in population growth rate
C) Decrease in biodiversity over time
D) Increase in primary production

Which biome is characterized by having the greatest biodiversity?
A) Tropical rainforest
B) Desert
C) Tundra
D) Grassland

What is the primary source of energy for most ecosystems on Earth?
A) Sunlight
B) Wind
C) Water
D) Geothermal heat

What is the effect of deforestation on ecosystems?
A) Loss of biodiversity
B) Increase in oxygen levels
C) Expansion of ecosystems
D) Increase in primary producers

Which of the following factors is essential for photosynthesis in plants?
A) Sunlight
B) Oxygen
C) Nitrogen
D) Wind

What term describes the natural process by which ecosystems recover after a disturbance?
A) Ecological succession
B) Photosynthesis
C) Biomagnification
D) Nitrogen fixation

Which of the following is a non-renewable resource?
A) Fossil fuels
B) Wind energy
C) Solar energy
D) Biomass

If you are interested to enhance your knowledge regarding PhysicsChemistryComputer, and Biology please click on the link of each category, you will be redirected to dedicated website for each category.

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button