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#habitat

7 public questions tagged with this topic.

ZOOLOGY

Which characteristic of amphibians limits their distribution to moist environments?

Amphibians require moist environments because they undergo external fertilization and have aquatic larval stages. 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 (Zoology section), Chapter: Principles of Inheritance, Molecular Basis of Inheritance and Biotechnology, Topic: Genetics, DNA techniques and applications.

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Animal Classification

Most amphibians are restricted to moist habitats because they

Most amphibians restricted to moist habitats because epidermis extremely thin, moderately keratinized, highly vascularized for cutaneous respiration allowing substantial transepidermal water loss lacking scales, feathers or waterproof lipids impeding desiccation. Mucous film required for oxygen diffusion, excessive evaporation up to several percent body mass per hour risks lethal dehydration. Absence of water-conserving scales or uricotelic adaptations unlike keratinized reptiles amplifies vulnerability. Nocturnal activity, burrowing, proximity to streams and damp leaf litter, dependence on fr

Ref: NCERT Class 11 Chapter 4 Amphibian Adaptations; Campbell Biology 12th ed. Chapter 44 Water Balance Amphibians

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SPECIES

Umbrella species typically require:

“Extensive territories for viable populations” for umbrella species typically require. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Ecological interpretation requires separating the immediate process from its broader consequence. A mechanism operating through physiology or behavior can scale up to alter survival, reproduction, abundance, distribution, and community structure. The remaining alternatives—“Small habitats”, “Limited resources”, “Highly specialized diets”—refer to different states,

Ref: NCERT Biology Class 12, Ch. 15 Biodiversity and Conservation

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Habitat Niche

The niche of a species includes:

“Both biotic and abiotic resources” for the niche of a species includes. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. A niche is the multidimensional set of abiotic conditions, resources, and biotic relationships under which a population can persist. The fundamental niche reflects physiological and resource limits, while the realized niche is modified by competitors, consumers, mutualists, and dispersal barriers. The remaining alternatives—“Only biotic resources”, “Only abiotic resources”, “Nei

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 13

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Species Control

Correct invasive species habitat pair:

“Prosopis juliflora – arid regions” for correct invasive species habitat pair. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Management outcomes depend on scale and context: suppressing abundance at one site does not guarantee regional eradication when dispersal reconnects treated and untreated populations. The remaining alternatives—“Eichhornia crassipes – arid”, “Lantana camara – wetlands”, “Parthenium hysterophorus – aquatic”—refer to different states, processes, or scales and therefore do no

Ref: Ecology: From Individuals to Ecosystems, Begon et al., 5th Ed., Ch. 21

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BIODIVERSITY & IDH

Which component reflects species diversity within a particular habitat?

Alpha diversity is the diversity within a particular local habitat or community. It may be measured simply as species richness or with indices such as Shannon or Simpson diversity that also incorporate relative abundance. For example, the diversity inside one pond, grassland plot, or forest quadrat is alpha diversity. Beta diversity compares composition among such habitats and represents species turnover, while gamma diversity pools species across the larger landscape or region. Delta diversity is sometimes used for turnover across broader geographic gradients, but it is not the standard local

Ref: NCERT Biology Class 12, Ch. 15 Biodiversity and Conservation

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