In 1927_________ developed the concept of ecological pyramids.

In an ecosystem the flow of _____________ is on way, while_________ is/are constantly recycled.

Which is an ectoparasite?

Which of the following in not an example of greenhouse gas?

Water, soil, air, temperature, wind and sunlight are example of ___________

At which trophic level in a food chain, carnivores get food?

The current level of urbanization in Pakistan is about __________ which is not high by global standards.

A relationship between species in which both species benefit is called________

Abiotic component of ecosystem is _________________

A group of organisms which can interbreed freely in nature to produce fertile offspring is called________

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

The type of symbiotic relationship in which one number get benefit and other is unaffected is called___________

In the food chain “grass- Rabbit-Fox-Bear-Mushroom”, how many types of decomposers are present?

The consumers that eat animals flesh as well as plants and plants products are called_______

Since 1800, amount of CO₂ in atmosphere has increased about______

Since 1800, amount of nitrous oxide has increased about_________

Nitrogen is an important component of _____________

The type of environment in which a particular species lives is called___________

IPCC stands for _________

Which one is not an example of abiotic factor?

A group of organisms, similar to one another, which can interbreed in nature and produce fertile offspring are called _______________

Which one of the following is not an endoparasite?

Which one of the following in not a temporary parasite?

In the food chain “tree-caterpillar-robin-hawk-coyote”, which is secondary consumer?

Living of nitrogen fixer bacteria in the root nodules of leguminous plants is an example of _____

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

The conversion of ammonia to nitrates is carried out by soil bacteria. This process is called_____

The temperature of Earth’s surface has increased________ per decade in the last 30 years

How many tanneries are operating in Kasur City?

Fungi digest the dead organic matter with the help of _________

Scientists fear that sea level is rising upto ______ per year.

In 2003, a survey on tanneries in Kasur city showed that __________ of residents suffered from cancer infections of kidney or loss of eyesight.

A relationship between two organisms in which individual of one species may kill and eat individuals of others species is called________________

An example of Carnivore plants is_______

Plants show competition for__________

The favorable variation tends to be ___________

Identify the correctly matched pair________________

When we eat the onion, our trophic level is _________

An aquarium is an example of ___________ecosystem.

The type of symbiotic relationship in which one member get benefit and other is harmed is called___________

The perfect cycle is ___________

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

Which one is an example of epiphyte?

Which one of the following is not as example of fossil fuels?

The base of food chain is always formed by____________

Habitat destruction can result in a loss of _______________

Habitat is an example of _______

_______ people are at risk of dengue.

Nitrogenous waste includes_______

A network of all the feeding relationship in an ecosystem is called________

The utilization of nitrates by organisms is called___________

Recycling of One Ton paper can save___________

Pakistan growth rate in1991 was _______

Upper layer of atmosphere is called ________

An epiphyte is an example of ___________

The self-sufficient unit of an environment that is formed as a result of interaction between its biotic community and its abiotic components is known as_____________

The major process that brings carbon from atmosphere into living world is ___________

_______ get solar energy and transform it into chemical energy by the process of photosynthesis.

More than normal denitrification __________the richness of soil.

The thickness of biosphere is ______________

It is estimated that Maldives might become uninhabitable within________

An organism that actively hunts other organisms is called____________

Organisms that make their own food with help of sunlight, CO2 and H2O are called_________

________ atom is the principal building block of many kind of biomolecules.

According to estimate at the current rate of increase, the average global temperature will go upto by _____ in the next 100 years.

The materials flow from one trophic level to the next by means of ________

Which of the following organisms are decomposers?

Graphic representation of the number of individuals per unit area at various trophic levels of a food chain is called_____________

The lowest trophic level of an ecosystem always includes___________

A symbiotic interaction in which both partners get benefits is ________

The living organisms which cannot prepare their own food but obtain ready made food from others are called_______

Which is the breakdown of the proteins of dead organisms to ammonia?

When living and non-living interact to produce a stable system in which exchange of material with flow of energy takes place, it forms a/an_________

Flow of energy is always ___________