Select the incorrect statement
1. India has more than 50,000 genetically different strains of rice
2. India has 100 varieties of mango
3. The genetic variation in Rauwolfia vomitoria can be in terms of concentration and potency of reserpine
4. The tropical rainforest initially covered 14% of the land surface of earth, but now they cover only 6% of the land area
Identify a, b, c and d in the given figure.
The pie-chart for the number of species of major taxa of invertebrates represent respectively
1. a – Insects; b – Crustaceans; c. – Molluscs; d – Other animal groups
2. a – Other animal groups; b – Crustaceans; c – Molluscs; d –Insects
3. a –Molluscs; b – Insects; c – Other animal groups; d – Crustaceans
4. a – Insects; b – Molluscs; c – Crustaceans; d – Other animal groups
Which of the following rainforest is home to more than 40,000 species of plants, 3000 of fishes, 1300 of birds, 427 of mammals, 427 of amphibians, 378 of reptiles and more than 1,25,000 invertebrates?
1. Amazonian
2. Tropical
3. Arctic tundra
4. Temperate
Find the false statement
(1) The number of fungi species is more than the combined total of the species of fishes, amphibians, reptiles and mammals
(2) Conventional taxonomic methods are not suitable for identifying microbial species.
(3) For many taxonomic groups, species inventories are more complete in temperate than in tropical countries.
(4) Insects form 70% part of all the species recorded
Find the true statement
a. If we consider biochemical or molecular criteria for microorganisms, their diversity may run into
millions.
b. There are 12 mega diversity centres in the world.
c. If we accept May’s global estimates, only 8.1 per cent of the total species have been recorded so far.
d. Western Ghats have greater amphibian species diversity than Eastern Ghats.
1. a and b 2. Only d
3. a and d 4. a, b and d
India has only ______ per cent of the world’s land area; its share of the global species diversity is an impressive _____ per cent
Find the incorrect statements
(1) India has nearly 45,000 species of plants and twice as many of animals
(2) A forest in a tropical region like equator has 10 times as many species of vascular plants as a forest of equal area in a temperate region like the mid-west of the US.
(3) Greenland 710N has only 56 species of birds.
(4) The diversity of plant and animals is uniform throughout the world.
The graph formed by plotting species richness against area for a wide variety of taxa (angiosperm plants, birds, bats, fresh water fishes, etc.) turns out to be a
(1) Parabola
(2) Straight line
(3) Rectangular hyperbola
(4) Any of these
Species diversity _______ as we move away from the equator towards the poles
(1) Increase
(2) Decrease
(3) First increases than decreases
(4) First decreases then increases
Which of the following factor has not aided in high species diversity of tropics?
(1) Less seasonal variation promoting niche specialisation
(2) Availability of more solar energy
(3) Less competition
(4) Constant environmental condition
From the following statements you have to select the right option that mentions observations shown by David Tillman, who performed long term ecosystem experiment using outdoor plots?
a. Plots with more species showed less year-to-year variation in total biomass
b. Plots with less species showed less year-to-year variation in total biomass
c. Increased diversity contributed to higher productivity
d. Plots with more species showed year-to-year variation in total rainfall
1. a and c 2. a and d
3. b and d 4. a, c and d
Which hypothesis suggest ecosystems are like aeroplane where flight (ecosystem functioning) may or may not be compromised depending upon which species are lost?
(1) Rivet popper hypothesis
(2) Gaia hypothesis
(3) Gause exclusion hypothesis
(4) Odum’s hypothesis
Match the following Column-I (recently extinct animals) with Column-II (places from where they are extinct) and select the correct option
Column-I Column-II
a. Dodo (i) Mauritius
b. Quagga (ii) Africa
c. Thylacine (iii) Australia
d. Sea cow (iv) Russia
1. a – (i) ;b – (ii) ; c – (iii) ; d – (iv)
2. a – (i) ;b – (ii) ; c – (iv) ; d – (iii)
3. a – (ii) ;b – (i) ; c – (iii) ; d – (iv)
4. a – (ii) ;b – (i) ; c – (iv) ; d – (iii)
The Evil Quartet is the sobriquet used to describe
(1) Population growth
(2) Causes of biodiversity losses
(3) Water pollutants
(4) DO of water body
Find the false statement
a. In the last 27 years, there is disappearance of 27 species
b. Three species (Bali, java and Caspian) of tiger are included in recently extinct animals
c. If we apply May’s estimate, then there are probably more than 1,00,000 plants species in India that are yet to be discovered and described.
d. There is more solar energy available in tropics, which contribute to higher productivity, this in turn
contributes directly to greater diversity
1. Only a 2. c and d
3. b and d 4. a and c
Loss of biodiversity in a region may lead to
(1) Decline in plants production
(2) Lowered resistance to environmental perturbations such as draught.
(3) Increased variability in certain ecosystem process such as plant productivity, water use, and pest and disease cycle
(4) All of these
Co-extinction means
(1) Introduction of alien species leading to decline or extinction of indigenous species
(2) Extinction due to over-exploitation
(3) Extinction due to habitat loss
(4) Extinction due to obligatory association of plant or animal
Sacred groves are present in
(1) Khasi and Jaintia hills in Meghalaya
(2) Aravalli hills of Rajasthan
(3) Western Ghat regions of Karnataka and Maharashtra
(4) All of these
To protect and improve the quality of our environment, government of India has passed Environment (Protection) Act in the year ______
1. 1974 2. 1981
3. 1986 4. 1987
Term ‘biodiversity’ was popularised by
1. Robert May 2. Edward Wilson
3. Paul Ehrlich 4. C. Mobius
Choose the incorrect match regarding examples of recent extinctions.
1. Quagga - Africa
2. Steller’s Sea Cow - Russia
3. Dodo - Myanmar
4. Thylacine - Australia
Select the incorrect statement
1. Species diversity decreases as we move away from the equator toward the poles.
2. The IUCN red list (2004) documents the extinction of 784 species in the last 500 years.
3. Amazon rainforest is so huge that it is called the ‘heart of the planet’
4. Extinction of Steller’s sea cow and passenger pigeon were due to their overexploitation by humans.
National Forest Policy __A__ of India has recommended __B__ forest cover for the plains and __C__ for the hills. Fill the blanks with suitable A, B and C
A B C
1. 1988 33% 67%
2. 1988 30% 19.4%
3. 1989 30% 65%
4. 1987 19.4% 30%
‘Chipko Movement’ was originated in Himalayan region. At present this region is a part of ______
1. Uttar Pradesh 2. Uttarakhand
3. Himachal Pradesh 4. Jammu and Kashmir
Which one is not a cause of biodiversity loss?
1. Alien species invasion.
2. Co-extinction.
3. Endemism.
4. Overexploitation