According to Ecologists and Evolutionary Biologists, the probable reason for speciation in tropics is not

  • Speciation is generally a function of time, more time without environmental disturbances better chance of speciation

  • No frequent glaciation unlike temperate regions in the past

  • Constant environment supports niche specialisation

  • Tropics had more adapted animals and had a high rate of reproduction so there is more diversity

……a… have remained relatively undisturbed for millions of years and thus had a long evolutionary time for……b..The constant environments promote…c..and had a greater species diversity.

Which of the following is correct?

  • a-Tropical latitudes

  • b-niche specialization

  • c- species diversity

  • b- constant environment

The higher diversity of tropics is actually favoured by all except

  • High solar energy

  • Constant and predicatable environment

  • No environmental disturbances like glaciations

  • Animals with high reproductive rates

Alexander Von Humboldt:

Find the wrong one out.

  • German Naturalist

  • German Geographer

  • First one to explore South American Jungles

  • Gave Rivet Popper Hypothesis

The idea of Species Area Relationship was given by

  • Edward Wilson

  • Paul Ehrlich

  • A.V. Humboldt

  • Katherine Esau

According to Species-Area relationship-

(1) Within a region, species richness  increased with increasing explored area, but only up to a limit

  • (4) Both and (2)

  • Within a region, species evenness increased with an increasing explored area without limit

  • Within a region, species diversity increases with increasing area.

  • 4

For which of the following the relationship between species richness and area turn out to be rectangular hyperbola?

  • Gymnosperms

  • Pteridophytes

  • Marine Fishes

  • Bats

The graph for species-area relationship is actually plotted between

  • Species richness and area

  • Species evenness and area

  • Species diversity and area

  • Species diversity and space

On a logarithmic scale, the relationship of species richness and area is a straight line described by the equation

  • logS= logC+logZ

  • logS= logZ+logA

  • logS= logC+ZlogA

  • logS= logZ+ClogA

. logS= logC+ZlogA

What would be the equation for rectangular hyperbola?

Note: the information in brackets actually defines the superscript in each option.

  • S=C^ZA

  • S=C A^Z

  • S=Z A^C

  • S=Z^A C

. logS= logC+ZlogA

Find the wrong one.

  • S= Species diversity

  • A= Area

  • Z= regression coefficient

  • C=Y intercept

In the logarithmic equation of species area relationship,  The Z implies except

  • Slope of the line

  • Regression Coefficient

  • Y intercept

  • Value generally 0.1-0.2

The value of Z depends upon

(2) Different Regions

  • Type of taxonomic group

  • (4) Both  and (3)

  • Area

  • 4

Which of the following pairs will have Z value in between 0.1 to 0.2?

  • Birds of California and frugivorous birds of tropical forests

  • Birds of California and Molluscs in New York state

  • Molluscs in New York state and Frugivorous birds of tropics forests

  • Molluscs in New York state and mammals in tropical forests

If Z value is found to be 1.15, which of the following species richness was actually studied?

  • Frugivorous birds in the tropical Forests of different continents

  • Plants in Britain

  • Birds in California

  • Molluscs in New York state

If Z value is in between 0.6 to 1.2,This implies

  • Steeper slope

  • More towards the horizontal  axis

  • The value of species richness decreases must faster than the area explored

  • Plants of Britain can have this value

If the area explored is the entire continent, then the slope of the line for species-area relationship would be

(2) Much reasonable

  • Much gentle

  • (4) Both  and (3)

  • Much steeper

  • 4

Who among the following gave tentative answers to the question that how do the attributes of a stable community are linked to species richness in a community?

  • Paul Ehrlich

  • David Tilman

  • A V. Hamboldt

  • Edward Wilson

Which of the following is not an attribute of stable community?

  • Resistant to occasional disturbances

  • Resistant to invasions by alien species

  • Resilient to occasional disturbances

  • High productivity with great variation year to year

Rich biodiversity is not important for

(1) Healthy ecosystem

  • (4) Both  and (2)

  • Survival of human race on this planet

  • Alien species

  • 4

Paul Ehrlich

Which of the following is wrong about him?

  • Stanford Ecologist

  • Rivet Popper Hypothesis

  • Importance of species actually affects the extent of stability of ecosystem

  • Worked on Outdoor plots for the apology he proposed

David Tilman actually proposed that

  • The long term ecosystem experiments using out door plots with less species showed less year to year variation in total number

  • The long term ecosystem experiments using out door plots with more species showed less year to year variation in total biomass

  • The long term ecosystem experiments using out door plots with more species showed more year to year variation in total number

  • The long term ecosystem experiments using indoor plots with less species showed less year to year variation in total biomass

According to Rivet Popper Hypothesis, which of the following is not correct?

  • Airplane: ecosystem

  • Rivets: species

  • Popping a rivet: causing a species to become extinct

  • Flight safety: number of species

Which of the following loss of rivet will be more crucial for the flight safety?

  • Loss of rivets on the wings

  • Loss of rivets on the seats

  • Loss of rivets on Windows inside the plane

  • Both A and C

Which of the following is not correct according to analogy given by Paul Ehrlich?

  • Loss of the key species that drive the major ecosystem functions is a more serious threat to flight safety than loss of other less important species

  • Proper functioning of ecosystem is initially may not be affected by species loss

  • Over a period of time, if the species loss is continuous, the ecosystem gets affected after a time

  • Even the loss of not much significant species lead to crtical damage to ecosystem.

The colonisation of tropical Pacific Islands by humans is said to have led to the extinction of more than

  • 5000 species of native birds

  • 2000 species of native birds

  • 1500 species of mammals

  • 3500 species of mammals

Which of the following data is not according to IUCN Red List (2004)?

  • Vertebrates-338

  • Invertebrates-359

  • Plants-87

  • Bacteria-104

The extinctions of 784 species recorded in IUCN Red List (2004) happened over

  • Last 240 years

  • Last 500 years

  • Last 300 years

  • Last 400 years

Which of the following is wrongly matched recent extinction?

  • Dodo-Mauritius

  • Quagga-Africa

  • Thylacine-Australia

  • Steller's Sea Cow- Stanford

Which of the following is not recently extincted subspecies of tiger?

  • Bali

  • Javan

  • Caspian

  • Sumata

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