12 public questions tagged with this topic.
Human activities such as habitat destruction, pollution, and over-exploitation have caused a rapid increase in species extinction rates. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept.
Species extinction can be caused by multiple factors, including natural disasters, human over-exploitation, and climate change. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept.
Human activities such as habitat loss and fragmentation, overexploitation, alien species invasions, and co-extinctions have greatly accelerated extinction rates.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Causes - Habitat Loss Overexploitation
Human activities such as habitat loss and fragmentation, overexploitation, alien species invasions, and co-extinctions have greatly accelerated species extinction.
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.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Causes - Habitat Loss Overexploitation
Habitat loss and fragmentation, overexploitation, alien species invasions, and co-extinctions are the major causes of biodiversity loss described in NCERT.
Ref: NCERT Class 12 Biology Chapter 13: Biodiversity and Conservation Loss of Biodiversity - Causes - Habitat Loss Overexploitation
According to NCERT, the present extinction rate is 100–1000 times the natural background rate because of 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
“Small, far from mainland” for which island condition is likely to have high species extinction. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Island biogeography explains species richness as a dynamic balance between immigration and extinction. Immigration generally declines as an island fills with species, whereas extinction rises as more species divide finite area and maintain smaller populations. The remaining alternatives—“Large, near mainland”, “Small, near mainland”, “Large, far from main
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 1-4
“Island area” for according to island biogeography theory, what influences extinction rate significantly. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. At equilibrium, species identities can continue to turn over even when richness is approximately stable. The model predicts a balance of rates, not an absence of colonization or extinction. The remaining alternatives—“Island color”, “Island altitude”, “Island shape”—refer to different states, processes, or scales and therefore do not express the
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 1-4
“Island birds” for introduction of predators like rats and cats most affects. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Extinction risk rises when abundance, geographic range, or genetic variation becomes small because demographic chance, environmental fluctuations, inbreeding, and rare catastrophes then have disproportionate effects. Correlated losses among subpopulations further weaken regional persistence. The remaining alternatives—“Marine mammals”, “Terrestrial reptiles”, “Amphibians”—r
Ref: Conservation Biology, Primack & Sher, 6th Ed., Ch. 7
“Gilpin and Soulé” for the extinction vortex was first described by. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. The mechanism should be evaluated across both local and global scales. Local disappearance can be reversed by recolonization, whereas global extinction is irreversible and requires the loss of every surviving population. The remaining alternatives—“Darwin and Wallace”, “Frankham and Soulé”, “Stephens and Bradshaw”—refer to different states, processes, or scales and therefore do not
Ref: Conservation Biology, Primack & Sher, 6th Ed., Ch. 7
“Habitat destruction and introduced species” for which is the major cause of species extinction globally. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Extinction risk rises when abundance, geographic range, or genetic variation becomes small because demographic chance, environmental fluctuations, inbreeding, and rare catastrophes then have disproportionate effects. Correlated losses among subpopulations further weaken regional persistence. The remaining alternatives—“Natural disasters”, “High g
Ref: Conservation Biology, Primack & Sher, 6th Ed., Ch. 7
