Biodiversity and Conservation

The genetic variation shown by Rauwolfia might be in terms of

• A) Potency of Reserpine

• B) Concentration of Reserpine

• C) Fragrance of Reserpine

• D) Both A and B

Deserts. rain forests. mangroves. coral reefs, wetlands,

estuaries and alpine meadows can be employed to describe

• Genetic diversity

• Species diversity

• Ecological diversity

• All of the above

About tbe total number of species present on earth, a

more conservative and scientifically sound estimate was

made by

• Robert May

• Robert Costanza

• Alexander Von Humboldt

• Both A and B

Among animals, the most species rich taxonomic group

is

• Fungi

• Vertebrates

• Invertebrates

• Crustacean

Biologists are not sure about how many prokaryotic

species there might be. The problem is that

• Conventional taxonomic methods are not suitable

  for identifying microbial species

• Many prokaryotic species are simply not culturable

  under laboratory conditions

• Microbes are too small so not easily visible under

  the microscopes

• None of the above

If we accept May's global estimates. then the total

species that have been recorded so far are about

• 70%

• 22%

• 68%

• 8.1%

The pattern of biodiversity is affected by

• A) Latitudinal gradients

• B) Species-area relationships

• C) Both A and B

• D) None of the above

Speciation is generally a function of

• Area

• Volume

• Time

• None of the above

The species-area relationship on a logarithmic scale (log

scale) is

• Rectangular parabola

• Rectangular hyperbola

• Straight line/linear

• Sigmoid

David Tilman's long-term ecosystem experiments

using outdoor plots showed that

• lncreased diversity contributed to lower productivity

• lncreased diversity contributed to higher productivity

• lncreased diversity has no impact on productivity

• lncreased diversity has unpredictable impact on productivity