175 public questions tagged with this topic.
Speciation increases biodiversity. The major causes of biodiversity loss are habitat loss and fragmentation, overexploitation, alien species invasions, and co-extinctions.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Causes - Habitat Loss Overexploitation
Species with small populations are more vulnerable because they are more susceptible to habitat loss, environmental changes, and genetic problems.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Causes - Habitat Loss Overexploitation
Endemic species are restricted to a particular geographical region and are often more vulnerable to extinction.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Causes - Habitat Loss Overexploitation
Biodiversity hotspots are regions rich in endemic species that have experienced extensive habitat loss and are therefore priorities for conservation.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Causes - Habitat Loss Overexploitation
Human activities have accelerated extinction rates to about 100–1000 times the natural background rate through habitat loss and fragmentation, overexploitation, alien species invasions, and co-extinctions.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Causes - Habitat Loss Overexploitation
The NCERT "Evil Quartet" consists of habitat loss and fragmentation, overexploitation, alien species invasions, and co-extinctions. Pollution is not included in this list.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Causes - Habitat Loss Overexploitation
Energy transfer is not 100% efficient; only about 10% of energy is passed on to the next trophic level.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Energy Flow - Food Chains Food Webs Trophic Levels
Decomposers can be part of food chains, especially in the detritus food chain.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Energy Flow - Food Chains Food Webs Trophic Levels
Resource partitioning allows species to coexist by utilizing different aspects of a shared resource, reducing competition.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Competition - Competitive Exclusion
Intraspecific competition occurs between members of the same species, such as two male deer competing for a mate.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Competition - Competitive Exclusion
Fluctuations in birth and death rates due to environmental factors and resource availability lead to population changes over time.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Competition - Competitive Exclusion
A realized niche refers to the actual space and resources a species utilizes after accounting for competition.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Competition - Competitive Exclusion
