Entrance Exams
Govt. Exams
With abundant resources and low initial population density, the deer population exhibits exponential growth (J-shaped curve). The carrying capacity has not yet been reached as numbers are still increasing rapidly without stabilization.
Density-independent factors (like weather, drought, floods) affect populations regardless of their density, whereas disease and competition are density-dependent as their impact increases with higher population density.
r-selected species (like insects and small rodents) typically produce many offspring with minimal parental investment and care. K-selected species (like elephants and humans) show extended parental care.
Community Reserves in India are established on community or private land to protect species, habitats, and ecosystems while allowing local communities sustainable use, balancing conservation with livelihood needs.
Directional selection operates when antibiotics kill susceptible bacteria, providing selective advantage to resistant strains, continuously shifting the population toward greater antibiotic resistance.
Energy pyramids are always upright because energy decreases at each trophic level due to metabolic losses, following the second law of thermodynamics, unlike biomass or number pyramids which can be inverted.
Habitat fragmentation, resulting from urbanization, agriculture, and infrastructure development, is identified as the primary driver of biodiversity loss in India, more significant than other factors.
Asian elephants are keystone species in Indian forests because their feeding and movement patterns significantly influence forest structure, vegetation composition, and create habitats for other species.
The phosphorus cycle is primarily abiotic, involving weathering of rocks, sedimentation, and geological processes, with minimal involvement of microorganisms compared to nitrogen or carbon cycles.
Gause's competitive exclusion principle states that two species with identical ecological niches cannot coexist indefinitely. Classic laboratory experiments with Paramecium species demonstrated that one species outcompetes and excludes the other.