The thickness of biosphere is ______________

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

A symbiotic interaction in which both partners get benefits is ________

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

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

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

How many tanneries are operating in Kasur City?

Which one is not an example of abiotic factor?

Flow of energy is always ___________

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

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

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

Since 1800, amount of CO₂ in atmosphere has increased about______

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_____________

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

Habitat is an example of _______

An organism that actively hunts other organisms is called____________

The lowest trophic level of an ecosystem always includes___________

An example of Carnivore plants is_______

Since 1800, amount of nitrous oxide has increased about_________

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

IPCC stands for _________

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

Recycling of One Ton paper can save___________

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

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

Which is an ectoparasite?

It is estimated that Maldives might become uninhabitable within________

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

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

Identify the correctly matched pair________________

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_________

Abiotic component of ecosystem is _________________

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

Fungi digest the dead organic matter with the help of _________

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

Which one of the following in not a temporary parasite?

Plants show competition for__________

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

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

More than normal denitrification __________the richness of soil.

Upper layer of atmosphere is called ________

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

The utilization of nitrates by organisms is called___________

Which one is an example of epiphyte?

An aquarium is an example of ___________ecosystem.

Nitrogen is an important component of _____________

_______ people are at risk of dengue.

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

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

Pakistan growth rate in1991 was _______

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

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

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

Nitrogenous waste includes_______

Habitat destruction can result in a loss of _______________

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

The perfect cycle is ___________

In 1927_________ developed the concept of ecological pyramids.

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

A relationship between species in which both species benefit is called________

The base of food chain is always formed by____________

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

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

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

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

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

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

The favorable variation tends to be ___________

Which one of the following is not an endoparasite?

When we eat the onion, our trophic level is _________

An epiphyte is an example of ___________

Which of the following organisms are decomposers?

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