Biodiversity and Conservation TS

The most serious negative impact of loss of biodiversity on humans would be due to :

Biodiversity hotspots are characterized by:

Exotic alien introduced species can become invasive in the introduced ecosystem due to:
I. preying on native species.
II. out-competing native species for food, light, and breeding habitat.
III. lack of natural predators.

Which of the following is not a cause for the loss of biodiversity ?

An endangered species as compared to a threatened species :

Year-to-year variation shown by areas with more species is ……… with respect to areas with less species.

David Tilman conducted long-term ecosystem experiments using outdoor plots. His findings include:
I. Plots with more species showed less year-to-year variation in total biomass.
II. Increased biodiversity contributed to higher productivity.

Habitat loss and fragmentation lead to loss of biodiversity primarily because:

Organisms that are least likely to experience extinction over the long term are most likely to be found in __________.

Consider the two statements:
I. Biological control by an introduced control can affect biodiversity.
II. An introduced control does not always target only the intended pest species; it can also target native species

The term “The Evil Quartet” is related with :

Which species is most likely to-be positively selected by natural selection ?

Where was the World Summit on Sustainable Development held ?

Species diversity _________ as we move away from the equator towards the poles.

Which of the following is not an example of in-situ conservation ?

What is the approximate percentage of the earth covered by terrestrial hot spots?

What is Biodiversity referred to as ?

Which one of the following are two hot spots of biodiversity in India ?

As estimated by Robert May, what is the total number of species present on earth ? 

Threats to biodiversity comes from :-

The narrowly utilitarian arguments for conserving include which of the following from the given list ?
(i) Industrial products like dyes, lubricants,
(ii) Ecosystem services like photosynthesis,
(iii) Pollinators layer of bees, birds and bats,
(iv) Firewood, fibre and construction material,
(v) The aesthetic pleasure of walking through thick,
(vi) Products of medicinal importance,
(vii) Watching spring flowers in full bloom,
(viii) Our moral duty to care for the well-being of each species.

Which of these statements is true ?

A keystone species is one that :-

Which of the following is NOT a major cause of biodiversity loss ?

What is the primary goal of in-situ conservation ?

What is cryopreservation ? 

India accounts for about ____% of the world’s land area and ____% of the global species diversity.

Which group has more species than fishes, amphibians, reptiles, and mammals combined ?

Amazon rainforests are referred to as the :

The equation log S = log C + Z log A represents :

In species-area relationships, the slope of the line (Z value) for very large areas like continents is :

Which ecologist proposed the ‘rivet popper hypothesis’ ?

The most important cause driving animals and plants to extinction is :

India is one of the ____ mega diversity countries of the world.

In species-area relationship, Z value for small areas ranges from :

Z value for frugivorous birds and mammals in tropical forests is about :

Increased species richness contributes to :

How many mass extinctions occurred before humans appeared ?

How many wildlife sanctuaries are present in India ?

Prokaryotes are not included in biodiversity estimates because :

If we consider invertebrates, the maximum global biodiversity, after insects, is seen in :

Current extinction rates are ____ times faster than pre-human times.

Which alien fish threatens native Indian catfishes ?

Among animals, the most species-rich group is :

Which of the following has greater amphibian diversity ?

More than ____% of recorded species are animals:-

New York has 105 bird species, while Colombia has about 1400. This shows :

India has how many varieties of mango ?

Which plant shows variation in reserpine content depending on the Himalayan region ?

How many genetically different strains of rice are found in India ?