Biodiversity an...

Given pie diagram represents the proportionate number of species of major groups of invertebrates. Identify the groups A and B. 

Dodo, passenger pigeon and Steller's sea cow become extinct in the last 500 years due to

Species diversity______as we move away from the _______towards_____.

On a logarithmic scale, the species area relationship is a straight line described by the equation log S = log C + Z log A.
What does S, C, Z and A represent in the given equation? Select the correct answer from the codes given below.
Species richness = 1
Slope of the line  = 2
Y- intercept          = 3
Area                    = 4

There are four major causes of accelerated rates of species extinction, which are collectively called as 'the evil quartet'. Which one of the following is not included in 'the evil quartet'?

An exotic species that is introduced to a new area, spreads rapidly and eliminates native species is called

The exotic species, which when introduced in India became notorious weed(s), is/are

The given pie diagram represents the proportionate number of species of major taxa of vertebrates. Identify the group A and B.

Identify the groups of organism marked A and B in the given pie diagram representing the proportionate number of species of major taxa of plants.

Which of the following fish led to the extinction of an ecologically unique assemblage of more than 200 species of cichlid fish in the take Victoria of E. Africa?

Which one of the following fish is being illegally introduced for aquaculture purposes and is posing a threat to the indigenous catfishes of Indian rivers?

When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct. This phenomenon is referred to as

Character of a stable community is that it
(a) should not show too much variations in year-to-year productivity
(b) must be resistant to occasional natural or man-made disturbances
(c) should be resistant to invasions by alien species
(d) all of these

Which of the following statements describe natural extinction?
(i) Extinctions abetted by human activities
(ii) Slow replacement of existing species
(iii) Also known as background extinction
(iv) A small population is most likely to be extinct

Which of the following statements regarding the estimates of number of species found on earth is not correct?

What is the decreasing order of the number of animals species as far as India is concerned?

The diversity of organisms sharing the same habitat or community is termed as

Species diversity______as one moves from high to low altitudes.

What is the total number of species present on earth as estimated by Robert May?

India is one of the 12 megadiversity countries of the world and is being divided into______biogeographical regions.

Antilope cervicapra (black buck) is

A critically endangered animal is

Read the given statement and select the correct option.
Statement 1: Tropical rainforests are disappearing fastly from developing countries such as India.
Statement 2: No value is attached to these forests because these are poor in biodiversity

Oragnisation responsible for maintaining Red Data Book is

Amazon rainforests are considered as 'lungs of the planet' as they contribute______of the total oxygen in the earth's atmosphere.

Introduction of alien species into new area poses a threat to extinction of indigenous species due to 

Genetic variations affect the production of the drug reserpine in the medicinal plant Rauwolfia vomitoria growing in different Himalayan ranges. What kind of diversity does it indicate?

Western ghats have a greater number of amphibian species than the Eastern ghats. What kind of diversity does it represent?

Keystone species deserve protection because these

Match column I with column II and select the correct option from the given codes.