People move to cities in search of:

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

The acidic rain pH ranges

The sharp rise in population is due to:

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

Since 1800. Carbon dioxide concentrations have increased up to:

The largest unit of living organisms on earth is:

Ecosystem comprises of:

Example of natural ecosystem is:

Burning of petroleum produces:

What does termite provide to protozoam?

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

Decomposers digest the organic material by secreting:

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

Which one of the followings is not a primary consumer?

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

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

Plants use nitrogen in form of:

Smog causes diseases like:

Epiphytes prepare its own food so it is called:

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

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

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

Carnivorous plants live where:

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

A source of matter for all living organisms is:

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

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

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

Most of the islands of Maldives are:

The term ecto-parasite means:

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

Which of the following is not a- polluting gas

Nitrogen fixation is:

Carbon dioxide is released back to environment by:

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

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

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

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

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

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

Sucker fish attaches to the surface of sharks by its.

When we eat onions, our trophic level is;

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

Which one of the followings is not a tertiary carnivore?

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

Who did develop the concept of ecological pyramids?

Air pollutants include

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

Acid rain is a result of:

All ecosystems of the world together form the:

Identify the correctly matched pair:

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

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

Inter-specific interaction:

Which bird is used to find honey-bee colonies:

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

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

What are the pests?

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

Over population:

What is the solution for issue of urbanization?

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

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

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

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

Producers store energy in their tissues and transform it into:

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

An organism's enviroment is the sum of

An organism's enviroment is the sum of

Which statement is true about producers?

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

According to IPCC global surface temperature has increased

Minerals released by decomposers are used as nutrients by:

Which famous building has been corroded by acid rain?

Carbon containing fossil fuels are:

Which one of the followings chains represents food chain?

In predation, one organism who attacks is called:

Which wonder of world is damaged by acid rain?

The effects of de-forestation include:

Which statement is false about excessive denitrification?

Types of ecological pyramids are:

Which art the principal decomposers of biosphere?

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

An example of tertiary carnivores is:

Example of permanent parasitism is:

Which of the following are basic facilities necessary for migrants?

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

Which of the following set is correct about Natural ecosystems?

Green house gases are:

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

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

Which of the following is not a temp6rary parasite?

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

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

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

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

Which competition is severe and strong?

Which of the followings form the base of food chain?

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

Which of the following rays cause skin cancers?

Example of endo-parasites?

Which of the following is an example of ectoparasite?

All ecosystems of the world together form the:

Abiotic components are broadly classified into:

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

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

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

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

Which industry is a coal based?

Carnivores cat:

Which of the following is not a carnivorous plant?

Movement of elements and in organic compounds is essential for:

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

In which way carnivorous plants attract insects?

Which group is a perfect match of producers?

Nitrogen is an important structural. component of necessary compounds like

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

What specific condition facing hospitals and schools due to urbanization?

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

Who can pick gaseous nitrogen directly from atmosphere?

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

Badgers are large mammals that feeds on:

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

Dominant producers in an aquatic ecosystem?

Total organic matter present in an ecosystem is called:

Epiphytes are small plants, they absorb water and minerals from

Which surfaces are easily corroded by acid rain?

The open spaces in cities should be reserved through?

Which is the primary source of energy of all ecosystem?

Which of the followings are immediate effects of noise pollution?

All carnivores are:

All sources of air pollution are related to:

Carbon cycle is a perfect cycle because:

Deforestation 'Means:

Interaction between the members of same species is called:

It is estimated that within 100 years Maldives might become:

The substances that actully cause pollution arc called:

The current level of urbanization in Pakistan is about:

Humans cut trees for:

Long term effects of noise pollution are

In which form carbon is found in nature?

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

Burning of coal produces

Protozoan lives in the intestine of termite and secrete:

What was the population rate of Pakistan in 1981?

Smog forms a:

Which one the following statements is correct about fertilizer industries?

Which of the following plant is a parasitic plant?

What is the positive impact of urbanization?

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

Which of the following is an example of artificial ecosystem?

In temporary parasitism:

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

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

Scientists fear that sea-level is rising up to:

Which of the following set is correct about Natural ecosystems?