Ecology MCQs with Answers

Which term describes the variety of species in a given area?

What is the study of how organisms interact with each other and their physical environment?

What is the term for the range of environmental conditions within which an organism can survive and reproduce?

What is the term for a group of individuals of the same species living in the same area?

What type of organism produces its own food through photosynthesis or chemosynthesis?

Which biome is characterized by grasses, scattered trees, and seasonal rainfall?

What term describes the gradual change in species composition of a given area over time?

What is the term for a group of interacting populations that inhabit the same area?

Which biome is characterized by low temperatures, little precipitation, and permafrost?

What is the term for the maximum population size that a particular environment can sustain indefinitely?

Which type of relationship benefits one species while having no effect on the other?

What is the term for the range of conditions under which an organism performs best?

What is the study of the relationships between organisms and their environment called?

What is the relationship where one organism benefits and the other is neither helped nor harmed?

Which process involves the conversion of atmospheric nitrogen into a form usable by plants?

What is the term for the total amount of living tissue at each trophic level in an ecosystem?

Which term describes a community's ability to withstand and recover from disturbances?

Which biome is characterized by high temperatures, humidity, and high levels of biodiversity?

What is the term for the specific place where an organism lives within an ecosystem?

What is the primary source of energy for most ecosystems on Earth?

Which ecological pyramid represents the total amount of living organic matter at each trophic level?

What is the ecological role a species plays in a community, including its habitat and interactions with other organisms?

Which biome is characterized by moderate temperatures, abundant rainfall, and broadleaf deciduous trees?

Which process involves the movement of individuals away from their place of origin or from centers of high population density?

What is the term for a diagram that shows the amount of energy or biomass at each trophic level in an ecosystem?

What is the term for the process where carbon dioxide is taken in by plants during photosynthesis?

What is the term for the process where nitrogen compounds are returned to the soil or water from organic matter?

What is the term for the process where plants release water vapor through their leaves?

Which term describes the feeding relationships between organisms in a community?

Which level of ecological organization encompasses all the individuals of a species within a given area?

What is the primary role of decomposers in an ecosystem?

Which type of species has a disproportionately large effect on its environment relative to its abundance?

What is the process where organisms release excess nutrients into the environment, leading to an overgrowth of algae?

Which process returns carbon dioxide to the atmosphere?

Which term describes the specific role an organism plays in its community, including its interactions with other organisms and the physical environment?

What is the term for the process by which nutrients are transferred through trophic levels in an ecosystem?

Which type of biome is characterized by cold temperatures, high winds, and low precipitation?

What is the process of succession where communities develop on bare rock without soil?

Which type of symbiotic relationship benefits both species involved?

What is the term for the relationship where one organism benefits at the expense of another?