Types of Species

Types of Species

Dominant tree species in wet woodlands in Western Europe is:

“Alder (Alnus glutinosa)” for dominant tree species in wet woodlands in western europe is. 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—“Bamboo”, “Oak”, “Maple”—refer to different states, processes, or scales and therefore do

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

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Types of Species

Phenotypic plasticity helps invasive species:

“Adapt to various environmental conditions” for phenotypic plasticity helps invasive species. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Species management must identify the demographic stage and ecological process that most strongly limits population growth. Prevention, early detection, removal, habitat manipulation, and biological control act at different points in an invasion or recovery trajectory. The remaining alternatives—“Develop specialized diets”, “Occupy narrow habitats”, “Reduce c

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

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Types of Species

Achatina fulica was originally introduced into India from:

“Mauritius” for achatina fulica was originally introduced into india from. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. A sound explanation connects the stated pattern to a causal pathway and distinguishes it from alternatives that describe different levels of organization or different ecological processes. The remaining alternatives—“North America”, “South America”, “Africa”—refer to different states, processes, or scales and therefore do not express the same causal relationship. Ecological in

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

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Types of Species

Empty niche hypothesis implies invasive species:

“Fill unused ecological niches” for empty niche hypothesis implies invasive species. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Niche differentiation reduces overlap by separating species along resource, space, or time axes. Such partitioning can stabilize coexistence when each species performs relatively better under the conditions it uses most strongly. The remaining alternatives—“Rely on novel biochemical weapons”, “Benefit from enemy release”, “Depend solely on propagule pressure”—refer t

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

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Types of Species

Species considered flagship species for conservation?

“Bengal tiger” for species considered flagship species for conservation. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Species management must identify the demographic stage and ecological process that most strongly limits population growth. Prevention, early detection, removal, habitat manipulation, and biological control act at different points in an invasion or recovery trajectory. The remaining alternatives—“Raccoon”, “Sea otter”, “Sea urchin”—refer to different states, processes, or scales

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

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Types of Species

Species introduced to Lake Victoria causing native fish decline?

“Nile perch” for species introduced to lake victoria causing native fish decline. 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—“Cane toad”, “Zebra mussel”, “Achatina fulica”—refer to different states, processes, or scales and

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

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Types of Species

Keystone species primarily influence ecosystems by:

“Controlling population sizes of other species” for keystone species primarily influence ecosystems by. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Rates depend on temperature, moisture, substrate quality, consumer physiology, and the elemental balance between organisms and their food. These controls explain why the same process can differ among terrestrial, freshwater, and marine systems without changing its definition. The remaining alternatives—“Increasing competition”, “Having high biomass

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

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Types of Species

Common impact of invasive species on native ecosystems?

“Decreased biodiversity” for common impact of invasive species on native ecosystems. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Effective control reduces propagule pressure or population growth without causing unacceptable non-target effects. Repeated monitoring is necessary because seed banks, dormant stages, recolonization, and density-dependent compensation can reverse short-term gains. The remaining alternatives—“Increased biodiversity”, “Stable ecological niches”, “Enhanced native popula

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

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Types of Species

Which invasive species is known as 'Congress grass'?

“Parthenium hysterophorus” for which invasive species is known as 'congress grass'. 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”, “Prosopis juliflora”, “Lantana camara”—refer to different states, processes, or scales and therefore do not express the same causal rel

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

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Types of Species

Invasive species typically become problematic because of their:

“High competition and rapid reproduction” for invasive species typically become problematic because of their. 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—“Low dispersal ability”, “Specialized dietary habits”, “Strict habitat requirements”—refer to different states, processes, or scales

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

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Types of Species

What type of species are pandas, considering their diet and habitat requirements?

“Specialist” for what type of species are pandas, considering their diet and habitat requirements. 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—“Generalist”, “Indicator”, “Flagship”—refer to different states, processes, or sc

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

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Types of Species

An organism sensitive to pollution, thus used to assess environmental quality, is called:

“Indicator species” for an organism sensitive to pollution, thus used to assess environmental quality, is called. 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—“Generalist species”, “Keystone species”, “Flagship species”—refer

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

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