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Recent questions tagged ecology-and-environment

According to central pollution central board (CPCB) which size of particulate matter are responsible for causing the greatest harm to human health?

asked Apr 2, 2014 by sreemathi.v

1 answer

Correct figure representing the concentration of DDT at different trophic levels at Victoria lake:-

asked Apr 2, 2014 by sreemathi.v

1 answer

Maximum green house gases are released by which country :-

asked Apr 2, 2014 by sreemathi.v

1 answer

The cutting of trees from the forests of hill near catchment area

asked Apr 2, 2014 by sreemathi.v

1 answer

Acidic rain is due to increase in atmospheric concentration of :-

asked Apr 2, 2014 by sreemathi.v

1 answer

Which of the following gas cause 'green house effect'

asked Apr 2, 2014 by sreemathi.v

1 answer

Which of the following organisms is likely to have more concentration of DDT in its body?

asked Apr 2, 2014 by sreemathi.v

2 answers

The term 'Biomagnification' refers to :-

asked Apr 2, 2014 by sreemathi.v

1 answer

In tertiary water treatment,for the removal of pathogens which substance can be used?

asked Apr 2, 2014 by sreemathi.v

1 answer

Destruction of stratospheric ozone is due to

asked Apr 2, 2014 by sreemathi.v

1 answer

World summit for sustainable development was held in 2002 at:-

asked Apr 2, 2014 by sreemathi.v

1 answer

What is the total no of biodiversity hot spots

asked Apr 2, 2014 by sreemathi.v

1 answer

Saving biodiversity so as to presence the resource provided by them is which argument of biodiversity conservation :-

asked Apr 2, 2014 by sreemathi.v

1 answer

Due to extinction of pollinator bee,a plant with obligate mutualism with this bee got extinct.This can be placed in which cause of extinction?

asked Apr 2, 2014 by sreemathi.v

1 answer

High species diversity:-

asked Apr 2, 2014 by sreemathi.v

1 answer

According to an estimate by Robert May, total species diversity is about:

asked Apr 2, 2014 by sreemathi.v

1 answer

Mild grazing in grassland by herbivores:-

asked Apr 2, 2014 by sreemathi.v

1 answer

Frequent blooms in a pond indicate:-

asked Apr 2, 2014 by sreemathi.v

1 answer

Chipko movement is related to :-

asked Apr 2, 2014 by sreemathi.v

1 answer

Which type of act has been formed for restriction & prohibition on hunting of animals & protection of specified plants?

asked Apr 2, 2014 by sreemathi.v

1 answer

Which of the following acts as a reservoir for phosphorus:-

asked Apr 1, 2014 by sreemathi.v

1 answer

Which of the following is a sedimentary cycle :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Amount of nutrients ,such as carbon,nitrogen,phosphorus,calcium etc present in soil at any given time is :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Succession taking in water :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Final community which stays in equillibrium with the environment is called :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Which of the following acts as a reservoir of nutrients in soil

asked Apr 1, 2014 by sreemathi.v

1 answer

Limitation of ecological pyramid is/are:-

asked Apr 1, 2014 by sreemathi.v

1 answer

In which process of decomposition enzymatic conversion of the decomposing detritus to simpler compound & inorganic substances occur?

asked Apr 1, 2014 by sreemathi.v

1 answer

Sources of energy in deep sea water is/are:-

asked Apr 1, 2014 by sreemathi.v

1 answer

Which one of the following statements for pyramid of energy is incorrect,where as the remaining 3 are correct?

asked Apr 1, 2014 by sreemathi.v

1 answer

An ecosystem comprising of producers,herbivores & carnivores is an incomplete ecosystem.It doesnot include

asked Apr 1, 2014 by sreemathi.v

1 answer

Mass of living matter at a trophic level in an area at any time is called:-

asked Apr 1, 2014 by sreemathi.v

1 answer

A food web:-

asked Apr 1, 2014 by sreemathi.v

1 answer

Which statement is true about this food chain :-Grass $\rightarrow$ Rabbit $\rightarrow$ Snakes $\rightarrow$ Hawks

asked Apr 1, 2014 by sreemathi.v

1 answer

If 2 species compete for same resource,they could avoid competition by choosing different times for feeding or different foraging patterns.This phenomenon is called :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Biological equilibrium is an equilibrium between

asked Apr 1, 2014 by sreemathi.v

1 answer

Annual net productivity of a biosphere is approx.equal to :

asked Apr 1, 2014 by sreemathi.v

1 answer

Which of the following is correct formula for GPP(Grass primary productivity)[NPP-Net primary productivity,R-Respiratory losses]

asked Apr 1, 2014 by sreemathi.v

1 answer

Autotrophic components of a pond ecosystem include

asked Apr 1, 2014 by sreemathi.v

1 answer

Optical distribution of different species occupying different levels is :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Functional unit of nature is :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Phytophagous insects show which kind of interaction with plants

asked Apr 1, 2014 by sreemathi.v

1 answer

Biological control method is based on which type of interaction?

asked Apr 1, 2014 by sreemathi.v

1 answer

Interaction is detrimental to both species is :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Mutualism can be represented as :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Normal growth graph in a population is :-

asked Apr 1, 2014 by sreemathi.v

1 answer

No of births during a given period of time in a population is

asked Apr 1, 2014 by sreemathi.v

1 answer

Which of the following is correct:-($N_t$=Population at time t,$N_{t+1}$=Population after a unit,$B$=Natality,D=Mortality,I=Immigration time,E=Emigration)

asked Apr 1, 2014 by sreemathi.v

1 answer

A group of organisms in a well defined geographical area,share or compete for similar resources,potentially interbreed are known as :-

asked Apr 1, 2014 by sreemathi.v

1 answer

Which character of species is not susceptible to extinction?

asked Apr 1, 2014 by sreemathi.v

1 answer

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