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

The biodiversity is positively associated with

  1. <p>Diversity of ecosystems</p>

  2. <p>Genetic variation within species</p>

  3. <p>Species diversity within communities</p>

  4. B and C only

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Biodiversity represents the sum of the total of various life forms such as unicellular fungi, bacteria, protozoa and multicellular organisms such as plants, fishes and mammals at various biological levels including gene, habitats and ecosystem. Thus, the correct option is E.

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

Species biodiversity is a combination of which two factors? 

  1. The number of different species and the number of ecosystems in which they are found

  2. The number of different species and the number of each of those different species in an area

  3. The number of different genes in an organism and the number of ecosystems in which a species is found

  4. The number of different species and the number of times a particular gene is found in the species

  5. The number of different genes in an organism and the number of each species found in an ecosystem.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Species diversity refers to the variety of species within a region. Measures of species diversity are the number of species in particular area. Greater the species richness, greater is the species diversity. The number of niches, trophic levels and various ecological process that sustain energy flow, food webs and recycling of nutrients is ecological diversity. Thus, the correct answer is A.
Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

What is a keystone species?

  1. A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival.

  2. A common species that has plenty of biomass, yet has a fairly low impact on the community's organization.

  3. A rare species that has minimal impact on the biomass and on other species in the community.

  4. A dominant species that constitutes a large proportion of the biomass and which affects many other species.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A keystone species is often a dominant predator whose removal allows a prey population to explode and often decreases overall diversity. Other kinds of keystone species are those, such as coral or beavers, that significantly alter the habitat around them and thus affect large numbers of other organisms.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

A biosphere reserve conserves and preserves

  1. Wild animals

  2. Land

  3. Natural vegetation

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

An area which is conserved to protect the biodiversity and culture of that area is known as biosphere reserve. A biosphere reserve is consisted of many protected areas like sanctuaries, national parks, lakes, lands mountains etc. 

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

All non-domesticated and non-cultivated biota in the natural environment are termed 

  1. Wildlife

  2. Ordinary life

  3. Domesticated life

  4. Stray life
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
 The term biota refers to a group of animals, plants or other organisms that share the same geographical region. All non domesticated and non cultivated biota in natural environment are called wild life. E.g. Lion, deer etc and plants like sunflower, thyme present in the natural environment.
So, the correct answer is 'Wildlife'
Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

The species though insignificant in number; determine the existence of many other species in a given ecosystem. Such species is known as

  1. Extinct species

  2. Keystone species

  3. Endemic species

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

A keystone species is a species that has a disproportionately large effect on its environment relative to its abundance. Such species are described as playing a critical role in maintaining the structure of an ecological community, affecting many other organisms in an ecosystem and helping to determine the types and numbers of various other species in the community. 

Extinction is the end of an organism or of a group of organisms (taxon), normally a species.
Endemic species is one that is only found in that region and nowhere else in the world. They are of conservation concern because they are not widespread and may be confined to only one or two protected areas. 
Certain life forms, often a keystone species, are sacred to indigenous peoples because they present a body of knowledge and ways leading to balanced relationship with life.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

Vertical distribution of different species occupying different levels in dense vegetation is called.

  1. Stratification

  2. Species composition

  3. Standing crop

  4. Trophic structure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vertical distribution of different species occupying different levels is called stratification. For example, trees occupy top vertical strata or layer of a forest, strubs the second and herbs and grasses occupy the bottom layers.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

Ecological amplitude of a species is related to

  1. Zones of stress

  2. Zone of optimum tolerance range of a factor

  3. Area with zones of optimum tolerance ranges of all determining factors

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

Ecological amplitude refers to the range of environmental conditions (tolerance) under which a species can survive and reproduce successfully.

Multiple choice botany ecosystem energy flow in food chain food chain and energy flow energy flow in ecosystem

Ecological efficiency is

  1. $\frac{Food\ energy\ assimilated}{Food\ energy\ ingested}$ x 100
  2. $\frac{Gross\ primary\ productivity}{Incident\ total\ solar\ radiation}$ x 100
  3. $\frac{Volume\ of\ CO _2\ evolved}{Volume\ of\ O _2\ consumed}$
  4. $\frac{Energy\ in\ biomass\ production\ at\ a\ trophic\ level}{Energy\ in\ biomass\ production\ at\ previous\ trophic\ level}$ x 100
  5. $\frac{Net\ primary\ productivity}{Gross\ primary\ productivity}$ x 100
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An ecological efficiency is the efficiency of energy transfer from one trophic level to the next trophic level. In other words, it is the energy in biomass production at a trophic level divided by energy in biomass production at previous trophic level. It is the ratio of energy flows at different trophic levels in a food-chain. It is expressed in percentage.

Thus, the correct answer is 'Energy in biomass production at a trophic level / Energy in biomass production at previous trophic level x 100.'

Multiple choice zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

Organisms respond to environment stimuli which would be

  1. Physical

  2. Chemical

  3. Biologocal

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

Stimuli can be of any type whether physical or mechanical, biological as in response to another organic thing or chemical including chemical compounds or environment.

So the correct option is 'All of the above'.

Multiple choice zoology living and non living characteristics of life attributes of living organisms signs of life biology : an introduction living world and classification

Living organisms must maintain a constant internal environment.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Living organisms must maintain a constant internal environment while living in a constantly changing external environment. Maintaining the internal environment is important because the processes that keep the cell alive can only take place under certain conditions. There are different processes that occur in the body to maintain the constant internal environment such as diffusion, osmosis, homeostasis, active transport, passive transport, endocytosis, exocytosis, etc. Homeostasis helps to maintain an equilibrium of an internal environment. 

So, the correct answer is 'True'