Ecology And Env...

Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?

In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the
1) Decomposer microorganisms to the surface.
2) Nutrients to the surface.
3) Bottom-dwelling organisms to the surface.
Which of the statements given above is/are correct?

Which of the following leaf modifications occurs/occur in desert areas to inhibit water loss?
1) Hard and waxy leaves
2) Tiny leaves or no leaves
3) Thorns instead of leaves
Select the correct answer using the codes given below.

The Millennium Ecosystem Assessment describes the following major categories of ecosystem services- provisioning, supporting, regulating, preserving and cultural. Which one of the following is supporting service?

Which one of the following is the best description of the term ‘Ecosystem '?

Which one of the following terms describes not only the physical spaceoccupied by an organism, but also its functional role in the community of organisms?

With reference to the wetlands of India, consider the following statements:
1) The country 's total geographical area under the category of wetlands is recorded more in Gujarat as compared to other States.
2) In India, the total geographical area of coastal wetlands is larger than that of inland wetlands.
Which of the statements given above is/are correct?

Consider the following statements
1. Under Ramsar convention, it is mandatory on the part of the Government of India to protect and conserve all the wetlands in the territory of India.
2. The Wetlands (Conservation and Management) Rules, 2010 were framed by the Government of India based on the recommendations of Ramsar convention.
3. The Wetlands (Conservation and Management) Rules, 2010 also encompass the drainage area or catchment regions of the wetlands as determined by the authority.
Which of the statements given above is/are correct?

With reference to a conservation organization called ‘Wetlands International ’, which of the following statements Is/are correct?
1) It is an intergovernmental organization formed by the countries which are signatories to Ramsar Convention.
2) It works at the field level to develop and mobilize knowledge, and use the practical experience to advocate for better policies.
Select the correct answer using the codes given below.

Consider the following pairs
Wetlands
1. Harike Wetlands
2. Keoladeo Ghana
3. Kolleru Lake
Confluence of rivers
: Confluence of Beas and Satluj/Sutlej
: Confluence of National Park Banas and Chambal
: Confluence of Musi and Krishna
Which of the above pairs is / are correctly matched?

If a wetland of international importance is brought under the 'Montreux Record ', what does it imply?

India is a party to the Ramsar Convention and has declared many areas as Ramsar Sites. Which of the following statements best describes as to how we should maintain these sites in the context of this Convention?

What would happen if phytoplankton of an ocean is completely destroyed for some reason?
1) The ocean as a carbon sink would be adversely affected.
2) The food chains in the ocean would be adversely affected.
3) The density of ocean water would drastically decrease.
Select the correct answer using the codes given below:

There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon?
1) Discharge of nutrients from the estuaries.
2) Run-off from the land during the monsoon.
3) Upwelling in the seas.
Select the correct answer from the codes given below:

Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?
1) Volcanic action
2) Respiration
3) Photosynthesis
4) Decay of organic matter
Select the correct answer using the code given below.

Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because  of
1) Its escape into the outer stratosphere.
2) The photosynthesis by phytoplankton in the oceans
3) The trapping of air in the polar ice caps.
Which of the statements given above is/ are correct?

With reference to food chains in ecosystems, consider the following statements:
1) A food chain illustrates the order in which a chain of organisms feed upon each other
2) Food chains are found within the populations of aspecies
3) A food chain illustrates the number of each organism which are eaten by others
Which of the statements given above is/are correct?

With reference to the food chains in ecosystems, which of the following kinds of organism is/are known as decomposer organism/organisms?
1) Virus
2) Fungi
3) Bacteria
Select the correct answer using the codes given below.

A pesticide which is a chlorinated hydrocarbon is sprayed on a food crop. The food chain is: Food crop-Rat- SnakeHawk. In this food chain, the highest concentration of the pesticide would accumulate in which one of the following?

In the grasslands, trees do not replace the grasses as a part of an ecological succession because of

Lichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of