Environmental Studies ยท Biology
Ecology and Biodiversity
1,739 Questions
Ecology and biodiversity are vital topics in environmental studies, covering ecosystem structures, species diversity, and environmental impacts. These concepts are frequently tested in competitive examinations for civil services and state selections. The questions cover carrying capacity, ecological succession, and conservation fundamentals.
Species richness measurementTypes of ecological diversityBiome distribution factorsCarrying capacity conceptEcosystem servicesEnvironmental Impact Assessment
Ecology and Biodiversity Questions
-
all nonliving things
-
all living things
-
only plants and animals
-
only rare and endangered species
B
Correct answer
Explanation
Biodiversity refers to the variety of all living organisms within an ecosystem, including plants, animals, fungi, and microorganisms. It does not include nonliving (abiotic) components, which are part of the ecosystem but not its biodiversity.
-
species
-
genes
-
habitats
-
individuals
A
Correct answer
Explanation
While biodiversity can be measured at genetic and ecosystem levels, its most common definition and measure is the variety of different species within an ecosystem.
-
Fish biology (size, lifespan, adaptations etc.)
-
Fish migration patterns
-
Fish eating habits
-
Fish reproduction cycles
A,B,C,D
Correct answer
Explanation
All of these types of biological and ecological data help fishers understand population dynamics, avoid catching breeding or juvenile fish, and target species at sustainable times and locations.
A
Correct answer
Explanation
Carrying capacity is the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available. Therefore, resource availability directly determines carrying capacity.
-
carrying capacity
-
maximum allotment
-
limiting factor
-
breaking point
A
Correct answer
Explanation
Carrying capacity is defined as the maximum population size of a species that a given environment can sustain indefinitely, based on available resources.
-
parasitism
-
flooding
-
disease
-
migration
B
Correct answer
Explanation
Flooding is a physical, non-living event, making it an abiotic factor rather than a biotic one. Parasitism, disease, and migration all directly involve living organisms and their interactions.
B
Correct answer
Explanation
Biotic and abiotic factors interact constantly in any ecosystem, as living organisms rely on non-living elements like water, sunlight, and air to survive and reproduce.
-
Earth's entire biosphere
-
only a single community
-
only one individual
-
a single ecosystem
A
Correct answer
Explanation
The interactions between living organisms and their non-living environments occur at all scales, ultimately spanning the entire biosphere of the Earth.
A
Correct answer
Explanation
An individual organism is directly influenced by both biotic factors, such as competitors or predators, and abiotic factors, such as temperature and water availability, which determine its survival.
-
trees
-
bacteria
-
fungi
-
soil
D
Correct answer
Explanation
Biotic factors are the living or once-living components of an ecosystem. Trees, bacteria, and fungi are all living organisms, whereas soil is an abiotic, non-living component.
-
environmental factors
-
biotic factors
-
biologic factors
-
antibiotic factors
B
Correct answer
Explanation
Biotic factors refer to all the living organisms within an ecosystem. The prefix "bio" means life, which helps identify these as the living components.
-
all the living parts of an ecosystem
-
all the non-living parts of an ecosystem
-
the way living & nonliving things interact
-
an ecosystem's renewability
B
Correct answer
Explanation
The prefix "a-" means "not" or "without" and "biotic" means living, so abiotic factors are the non-living parts of an ecosystem. Examples include sunlight, temperature, wind, water, and soil.
-
renewable & nonrenewable resources
-
oxygen & water
-
availability & community
-
biotic & abiotic factors
D
Correct answer
Explanation
The distribution and abundance of any species are determined by both living (biotic) interactions, such as predation and competition, and non-living (abiotic) conditions, such as temperature and water availability. Together, these two categories encompass all environmental influences on organisms.
-
zebra
-
grass
-
river
-
starfish
C
Correct answer
Explanation
Biotic factors are living components of an ecosystem. A river is a physical, non-living (abiotic) feature, while zebras, grass, and starfish are living organisms.
-
biotic factors
-
abiotic factors
B
Correct answer
Explanation
Abiotic factors refer to the non-living components of an ecosystem, such as sunlight, water, soil, and temperature. Biotic factors refer to living components.