Ecology Questions

Natural reservoir of phosphorus is:

In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?

Which one of the following pairs of geographical areas show maximum biodiversity in our country?

Genetic diversity in agricultural crops is threatened by:

One of the ex-situ conservation methods for endangered species is:

Which one of the following correctly represents an organism and its ecological niche?

Given below is one of the types of ecological pyramids.This type represents:

Which one of the following is correct matching of a plant, its habit and the forest type where it normally occurs?

Presently, the global atmosphere is warming up.

The age-sex structure of human population in countries like France and Germany gives a steep pyramid.

Identify the odd combination of the habitat and the particular animal concerned.

Which of the following ecosystem types has the highest annual net primary productivity?

The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?

One of endangered species of Indian medicine plants is that of:

Geometric representation of age structure is a characteristic of:

Which one of the following has maximum genetic diversity in India?

In a coal fired power plant electrostatic precipitators are installed to control emission of:

Which one of the following is not a bioindicator of water pollution?

Which one of the following pairs of organisms are exotic species introduced in India?

If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur:

A high density of elephant population in an area can result in:

Quercus species are the dominant component in:

About $70\%$ of total global carbon is found in:

Which of the following is NOT observed in biodiversity hotspots?

The World Summit on Sustainable Development ($2002$) was held in:

The slow rate of decomposition of fallen logs in nature is primarily due to their:

Which two of the following statements concerning food chains are correct?(a) Removal of $80\%$ tigers results in increased vegetation growth.(b) Removal of most carnivores results in an increased deer population.(c) Food chains are generally limited to $3-4$ trophic levels due to energy loss.(d) Food chain length varies from $2$ to $8$ trophic levels.

Study the population distribution of ten species ($\text{A-J}$) in four areas ($\text{a-d}$). Which area shows the maximum species diversity?

A global agreement in specific control strategies to reduce the release of ozone depleting substances was adopted by:

A scrubber in the exhaust of a chemical industrial plant removes:

A river with an inflow of domestic sewage rich in organic waste may result in:

Which of the following is the most important cause of animals and plants being driven to extinction?

The UN conference of Parties on climate change in the year 2012 was held at:

Which the following are most suitable indicator of ${\text{SO}}_2$ pollution in the environment?

During ecological succession:

Increase in concentration of the toxicant at successive trophic levels is known as:

Acid rain is caused by increase in the atmospheric concentration of:

Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of:

The species confined to a particular region and not found elsewhere is termed as:

In which of the following interactions both partners are adversely affected?

In which of the following both pairs have correct combination?

An association of individuals of different species living in the same habitat and having functional interactions is:

Most animals that live in deep oceanic waters are:

If $20\text{J}$ of energy is trapped at the producer level, then how much energy will be available to the peacock in the following food chain?$\text{plant}\to \text{mice}\to \text{snake}\to \text{peacock}$

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called:

In the representation of global diversity of invertebrates, what do the portions A, B, C, and D represent?

In a terrestrial phosphorus cycle, what do the labels A, B, C, and D represent?

Thousands of migratory birds from Siberia move to which place in India during the winter season?

What gases are produced in anaerobic sludge digesters?

The organization which publishes the Red List of species is:

The zone of atmosphere in which the ozone layer is present is called:

A species facing an extremely high risk of extinction in the immediate future is called:

Match the following and select the correct option:(a) Earthworm — (i) Pioneer species(b) Succession — (ii) Detritivore(c) Ecosystem service — (iii) Natality(d) Population growth — (iv) Pollination

A location with luxuriant growth of lichens on the trees indicates that the:

An example of ex situ conservation is:

Which of the following is responsible for the depletion of the ozone layer in the stratosphere?

Increase in the concentration of the toxicant at successive trophic levels is known as:

The pioneer species in a hydrarch succession are:

Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from:

Secondary productivity is the rate of formation of new organic matter by:

Which one of the following is not used for ex-situ plant conservation?

Which of the following represent the maximum number of species among global biodiversity?

During sewage treatment, biogases are produced which include:

A biologist studies a population of rats. Natality = 250, Mortality = 240, Immigration = 20, Emigration = 30. The net increase in population is:

Which process of decomposition is correctly described?

A sedentary sea anemone gets attached to the shell lining of a hermit crab. This association is an example of:

Global warming can be controlled by:

The Air (Prevention and Control of Pollution) Act came into force in India in the year:

Which of the following groups has the maximum number of species among the global biodiversity of plants and fungi?

The highest DDT concentration in aquatic food chain shall occur in:

A lake which is rich in organic waste may result in:

Which of the following National Parks is home to the famous musk deer or hangul?

The principle of competitive exclusion was stated by:

In a grazing food chain, the first trophic level is occupied by:

Red List contains data or information on:

Which of the following is correctly matched?

If '+' sign is assigned to beneficial interaction, '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '–' refers to:

Which of the following is correct for $r$ -selected species?

The primary producers of the deep-sea hydrothermal vent ecosystem are:

How many hot spots of biodiversity in the world have been identified till date by Norman Myers?

Joint Forest Management Concept was introduced in India during:

When does the growth rate of a population following the logistic model equal zero? The logistic model is given as $dN/dt=rN(1-N/K)$:

Kyoto Protocol was endorsed at:

Which of the following would appear as the pioneer organisms on bare rocks?

Which one of the following is a characteristic feature of cropland ecosystem?

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers:

Gause's principle of competitive exclusion states that: