7 public questions tagged with this topic.
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
Emigration leads to a decrease in population size as individuals leave a habitat.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Responses to Abiotic Factors - Regulate Conform Migrate Suspend
Nitrogen is not involved in the regulation of breathing rate, unlike CO₂, O₂, and blood pH.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Transport of Carbon Dioxide and Regulation of Respiration
“Food quality” for which of the following affects assimilation efficiency. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Ecosystem processes are constrained by energy conservation and by the cycling of matter. Energy enters mainly through primary production, is lost as metabolic heat at every transfer, and therefore cannot be recycled in the way that carbon, nitrogen, phosphorus, or water can. The remaining alternatives—“Body size”, “Prey speed”, “Sunlight intensity”—refer to different states, processes, or scales and therefore do not express the same causal relationship. The relevant inference should follow the pathway from resource supply to organismal uptake and then to ecosystem-level flux. Productivity, trophic transfer, decomposition, and nutrient regeneration are connected, but each measures a different part of that pathway. Linking the wording to measurable consequences for fitness, abundance, or flux gives the conclusion its scientific meaning and prevents a purely mnemonic interpretation.
Ref: Fundamentals of Ecology, Odum & Barrett, 5th Ed., Ch. 3
Peptide bond stability is the correct choice because it does not accurately describe or belong to the category addressed in this question. In the context of Protein Solubility, the other options (pH, Ionic strength, and Molecular weight) are all valid and well-established concepts. Peptide bond stability is either unrelated to the topic, describes a different biological process, or represents a common misconception. Questions framed as 'which is NOT' require students to identify the exception among otherwise correct statements, demanding comprehensive knowledge of the topic rather than recognition of a single fact.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 4
Increasing AT content correctly describes the effect or change asked about in this question. In DNA, understanding cause-and-effect relationships is essential for predicting biological outcomes. Increasing AT content occurs because of specific molecular interactions, thermodynamic principles, or regulatory mechanisms that govern this biological process. The other options (Increasing GC content, Increasing ionic strength, and Decreasing pH) describe either opposite effects, effects that occur under different conditions, or changes associated with unrelated processes.
Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.
Base pair polarity is the correct choice because it does not accurately describe or belong to the category addressed in this question. In the context of DNA, the other options (GC content, pH, and Temperature) are all valid and well-established concepts. Base pair polarity is either unrelated to the topic, describes a different biological process, or represents a common misconception. Questions framed as 'which is NOT' require students to identify the exception among otherwise correct statements, demanding comprehensive knowledge of the topic rather than recognition of a single fact.
Ref: Molecular Biology of the Gene, Watson et al., 7th Ed.
