Un-wanted, unpleasant and annoying sound arc termed as:

Carbon cycle is a perfect cycle because:

Air pollutants include

The flow of energy in different trophic levels of ecosystem is:

Protozoan lives in the intestine of termite and secrete:

Smog forms a:

 According to estimates, at the current rate of increase, the average global temperature will go up by..

Which one of the followings is not a tertiary carnivore?

Grass -->  Grass hopper --> Sparrow -->Hawk. This series represents:

Type of symbiosis in which one partner is benefited while other is neither benefited nor harmed is called:

Those components of environment which include non-living factors are known as

The phenomenon in which green house gases trap heat in the atmosphere and prevents rising warm air from escaping is.

A type of symbiotic interaction in which both partners get benefit and neither is harmed is known as:

A process in which nitrates and nitrites are reduced to nitrogen gas by denitrifying bacteria is called

An example of tertiary carnivores is:

Which of the following is not a temp6rary parasite?

Green house gases are:

Which one of the followings is not a primary consumer?

An organism's enviroment is the sum of

When we eat onions, our trophic level is;

When pollutans like hydrocarbons and nitrogen oxides combine in the presence of sun-light.

In ecosystems, the flow of____________ is one way, while__________________ is/are constantly recycled

Most of the islands of Maldives are:

Which wonder of world is damaged by acid rain?

Which art the principal decomposers of biosphere?

Example of natural ecosystem is:

Which of the followings are immediate effects of noise pollution?

When industrial revolution started some 250 years ago, the world population was at

In global warming glaciers melt fast and sea level rises and it causes?

Which of the following set is correct about Natural ecosystems?

Which form of Nitrogen is taken by the producers of the ecosystem?

In forniation of acid rain, sulphur and nitrogen interact with water vapour in the presence of sunlight and formed

Which competition is severe and strong?

Which one of the followings chains represents food chain?

The acidic rain pH ranges

An interaction between two animals of different species or between a plant or an animal is called:

Host can survive without parasite, but parasite cannot survive without host is called:

Epiphytes are small plants, they absorb water and minerals from

Which of the following Ls not a form of acid rain?

Decomposers digest the organic material by secreting:

The harmful effects of the UV rays are visible in the countries such as:

Which of the following statement is against to create a balance in nature?

Which of the following rays cause skin cancers?

Types of ecological pyramids are:

Which of the following is not a- polluting gas

All carnivores are:

Nitrogen fixation is:

In the food chain tree —> caterpillar —> robin —> hawk         coyote, which is the secondary consumer?

Who can pick gaseous nitrogen directly from atmosphere?

Producers get solar energy and transform it into chemical energy by the process of:

 Which one of the following industries -produces cotton dust, nitrogen oxides, chlorine, smoke and sulphur dioxide.

Which of the following-statement is correct about acid rain?

The study of inter-relationship between organisms and environment is called

Which of the following is a bacteria involve in conversion of nitrites into nitrates in the process of nitrification.

Which plant produces carbon monoxide, carbon dioxide, phenol, fluorine, cyanide?

Which group is a perfect match of producers?

The parasite spends their whole life cycle as parasites. (The statement belongs to)?

Example of permanent parasitism is:

The organisms of a population living in a habitat and interact with another collectively called ..

Long term effects of noise pollution are

Utilization of public transport instead of individual transport proves effective way to manage:

Carnivores cat:

All ecosystems of the world together form the:

Which is the primary source of energy of all ecosystem?

In which year united nations established inter governmental panel on climate change (IPCC)?

Interaction between the members of same species is called:

The cyclic pathways through which chemical elements move to organisms and back to environment is called.

Who did develop the concept of ecological pyramids?

Which one the following statements is correct about fertilizer industries?

What do producers take in from the atmosphere and convert into organic compounds?

The substances that actully cause pollution arc called:

What is the solution for issue of urbanization?

Carbon dioxide is released back to environment by:

A source of matter for all living organisms is:

Which famous building has been corroded by acid rain?

Which of the following plant is a parasitic plant?

People move to cities in search of:

Which of the following is not a carnivorous plant?

What was the population rate of Pakistan in 1981?

Minerals released by decomposers are used as nutrients by:

Movement of elements and in organic compounds is essential for:

Carbon containing fossil fuels are:

A group of organisms of a same species living in a particular area is called

The largest unit of living organisms on earth is:

Badgers are large mammals that feeds on:

Decomposition of the protein of dead organisms and nitrogen as wastes to ammonia is called:

Smog causes diseases like:

Burning of petroleum produces:

Which air pollutant destroys the ozone. molecules and break ozone layer?

Which of the following set is correct about Natural ecosystems?

What does termite provide to protozoam?

In predation, one organism who attacks is called:

Which statement is false about excessive denitrification?

The effects of de-forestation include:

What specific condition facing hospitals and schools due to urbanization?

According to IPCC global surface temperature has increased

Dominant producers in an aquatic ecosystem?

Total organic matter present in an ecosystem is called:

Burning of coal produces

For better life, human society is becoming mote and more dependent on:

Inter-specific interaction:

Carnivorous plants live where:

The rain polluted by acid that has been released into the atmosphere from factories and other industrial processes is called

The change of composition of air by adding harmful substances is called

In the food chain "grass —> rabbit —>  fox —> hear —> mushroom", .how many types of decomposers are present'?

In leguminous plants, bacteria obtain food and shelter from plants, what does bacteria do in return?

What is the positive impact of urbanization?

Deforestation 'Means:

In which form carbon is found in nature?

Which of the following is the abiotic component of the ecosystem?

A relationship between members of different species, in which they li%e together for a shorter or longer period is:

Humans cut trees for:

Which statement is true about producers?

In industrial nitrogen fixation, hydrogen is combined with atmospheric nitrogen under

The sharp rise in population is due to:

Over population:

Since 1800. Carbon dioxide concentrations have increased up to:

A network of food chains which are inter-connected at various trophic levels is called.

In which region of the world skin-cancer is higher:

Ecosystem comprises of:

Sucker fish attaches to the surface of sharks by its.

Plants use nitrogen in form of:

Scientists fear that sea-level is rising up to:

What are the pests?

Nitrogen is an important structural. component of necessary compounds like

Which industry is a coal based?

Acid rain is a result of:

What is the percentage of nitrous oxide has increased since 1800?

Which bird is used to find honey-bee colonies:

Identify the correctly matched pair:

All sources of air pollution are related to:

Which of the following is an example of artificial ecosystem?

When rain falls through polluted air it comes across chemicals such as:

In temporary parasitism:

It is estimated that within 100 years Maldives might become:

Which of the following is an example of ectoparasite?

An organism's enviroment is the sum of

A series of organisms, in which each type of organism feed on the one below it, in the series:

Which one of the followings is the reservoir of free gaseous -nitrogen?

Which surfaces are easily corroded by acid rain?

Epiphytes prepare its own food so it is called:

Producers store energy in their tissues and transform it into:

Organisms in the ecosystem that are responsible for the recycling of plant and animal wastes are:

All ecosystems of the world together form the:

A stage where living organism transforms gaseous nitrogen into nitrates is called

When sunlight reaches the surface of the earth much of its energy is transformed into:

"Energy can neither be created nor destroyed but can be transformed from one form into another" is:

The term ecto-parasite means:

Example of endo-parasites?

The current level of urbanization in Pakistan is about:

In ecology, the levels of organization range from organism to:

The open spaces in cities should be reserved through?

Rise in sea-level has worst effects on the countries that are:

Abiotic components are broadly classified into:

Which of the followings form the base of food chain?

Which of the following are basic facilities necessary for migrants?

In which way carnivorous plants attract insects?