Environmental Studies · Biology

Ecology and Biodiversity

1,739 Questions

Ecology and biodiversity are vital topics in environmental studies, covering ecosystem structures, species diversity, and environmental impacts. These concepts are frequently tested in competitive examinations for civil services and state selections. The questions cover carrying capacity, ecological succession, and conservation fundamentals.

Species richness measurementTypes of ecological diversityBiome distribution factorsCarrying capacity conceptEcosystem servicesEnvironmental Impact Assessment

Ecology and Biodiversity Questions

Multiple choice population and how it changes human population ecology and environment zoology

Individuals having similar life cycle experiencing similar ecological parameters at similar stage of life cycle are

  1. Guild

  2. Population

  3. Ecocline

  4. Biotype
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

"Population" is defined as a group of individuals of the same species living and interbreeding within a same given area. Members of a population often rely on the same resources and are subject to similar environmental constraints.

"Guild" is any group of species that exploit either same resources or different resources in related ways. Also, it is not necessary that the species within a guild occupy the same, or even similar  ecological niches.
"Ecoline"  is a physical transition zone. It is a variation of the physicochemical environment of one or two physicochemical factors.
"Biotype" is a group of individuals that are genetically identical but form a physiologically distinct race within a species, having dissimilar parameters.
Hence, answer is "Population".

Multiple choice population and how it changes human population ecology and environment zoology

A population is a group of

  1. Species in a community

  2. Communities in an ecosystem

  3. Individuals in a family

  4. Individuals in a species
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A group of different organisms with related characters of a same area is called population.

So the correct option is 'individuals in a species'.

Multiple choice population and how it changes human population ecology and environment zoology

Population ecology is an important area because it (i) ecology to population genetics and (ii) identify (i) and (ii) in the above statement and select the correct option.
                                                       

  1. distinguishes evolution

  2. distinguishes biogenesis

  3. links evolution

  4. links biogenesis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Population ecology is the sub field of ecology that deals with the dynamics of species populations and how these populations interact with the environment. It is an important area because it links the ecology to population genetics and responsible for evolution. 

So, the correct option is 'Option C' .

Multiple choice population and how it changes human population ecology and environment zoology

A biological community can be best described by

  1. A group of individuals of the same species that live together in the same area at the same time

  2. All populations of different species that live and interact in the same area

  3. All populations of different species that live and interact in the same area and the abiotic environment

  4. The part of earth where life exists

  5. A group of organisms that share similar ecological niches in different areas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The population is individuals of same species that occupy a specific area. The ecosystem is an assemblage of different species of an area and abiotic factors of a geographical area and also takes account of the interaction between them. The part of the earth where life exists is referred to as biosphere. A group of organisms that share similar ecological niches in different areas constitute species. The community is a group of populations of different species living together in a habitat and interacting with each other. Thus, the correct answer is B.

Multiple choice zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

Biomagnification refers to

  1. Rapid growth due to excessive intake of nutrients

  2. Increase in population size

  3. Decrease in population size

  4. Increase in concentration of nondegradable pollutants as they pass through food chain.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biomagnification is the property of a toxin to accumulate in the food chain by solubilizing with the adipose tissues of the living organisms. It is seen that the level of nondegradable pollutants increases as the food chain progresses. It means, the primary consumers will have more nondegradable pollutants concentration than the producers, the secondary consumers will have more than primary consumers and so on. The highest concentrations will be seen in the top carnivore. This is because the consumers at the successive trophic level consume more than the previous level to fulfil the energy requirements. Due to this, nondegradable pollutants keeps on accumulating in the successive trophic levels in higher concentrations. This process is called the biomagnification.

Hence, the correct answer is 'Increase in concentration of nondegradable pollutants as they pass through food chain.'

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Which of the following statements is incorrect regarding biodiversity?

  1. Biodiversity deals with biological and geographical units such as genes, chromosomes, species, families and biogeographic religions.

  2. Biodiversity is an addition sum of genetic, taxonomic and ecosystem diversity.

  3. It is a measure of the amount of resources shared by the human population.

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Biodiversity refers to the variety and variability of life on Earth. Biodiversity is typically a measure of variation at the genetic, species, and ecosystem level.
  • It deals with biological and geographical units such as genes, chromosomes, species, families and biogeographic religions
  • It is an additional sum of genetic, taxonomic and ecosystem diversity.
  • Biodiversity is a measure of species richness i.e  The number of groups of genetically or functionally related individuals.
  • Hence Biodiversity is a measure of the number of resources shared by the human population is a wrong statement.
  • So, the correct answer is 'Option C'.
Multiple choice zoology diversity of life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Rate of replacement of species along a gradient of habitats/communities is called 

  1. $\alpha$ - diversity
  2. $\beta$ - diversity
  3. $\gamma$ - diversity
  4. $\omega$ - diversity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The local species pool is known as alpha diversity. It is also the diversity present within the community. Beta diversity is the diversity present between the communities. The diversity present in the ranges of communities is known as Gamma diversity.

So, the correct answer is 'β - diversity'.

Multiple choice zoology diversity of life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

The term biodiversity is related to 

  1. All living plants

  2. All living animals

  3. All living plants and animals

  4. Living plants, animals and microbes found in their natural habitats
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Biodiversity is the term popularised by the sociobiologist Edward Wilson to describe the combined diversity at all the levels of biological organization. It is related to all living plants, animals, and microbes found in their natural habitats. There are more than 20,000 species of ants, 3,00,000 species of beetles, 28,000 species of fishes and nearly 20,000 species of orchids. The biodiversity is measured at three levels; genetic diversity, species diversity and ecological diversity.
So, the correct answer is 'Living plants, animals and microbes found in their natural habitats'.
Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Variety of organisms existing on the earth, their interrelationships and their relationship with the environment is called as

  1. Diversity

  2. Biosphere

  3. Biology

  4. Biodiversity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biodiversity is the variation in living organisms from all sources such as terrestrial and aquatic ecosystems. It also involves the interaction of the biotic and abiotic factors with each other. Biodiversity is responsible for maintenance of balance in the ecosystem. Thus the correct answer is option D.

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Measure of biodiversity of an area is

  1. The number of species found there

  2. The range of different life forms

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biodiversity is the variety of different types of life found on the Earth and the variations within species. It is a measure of the variety of organisms present in different ecosystems. Hence, the correct answer is option C.

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

The study of total number and types of organisms present on earth is

  1. Ecology

  2. Taxonomy

  3. Biodiversity

  4. Classification
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biodiversity is the term used to describe the variety of life found on Earth and all of the natural processes. This can refer to genetic variation, ecosystem variation or species variation within an area, biome or planet. The biodiversity is more concentrated within the tropical ecosystems than temperate ecosystems. The most diverse group of animals are invertebrates. 
Some human activities have indirect but wide-reaching effects on biodiversity, including climate change and pollution. These threats have put a serious strain on the diversity of species on Earth.

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Variety of organisms in different ecosystem can be measured by 

  1. Genetics

  2. Microbiology

  3. Biodiversity

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biodiversity is the measure of the variety of life on the earth. It can refer to genetic variation, ecosystem variation, or species variation within an area, biome, or planet. Thus, the correct answer is option C.

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

................ is a measure of the variety of organisms present in different ecosystems.

  1. Environment

  2. Biodiversity

  3. Generation

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biodiversity, a contraction of "biological diversity," generally refers to the variety and variability of life on the Earth. One of the most widely used definitions defines it in terms of the variability within species, between species and between ecosystems. It is a measure of the variety of organisms present in different ecosystems.