Q. No.Given below are pie diagrams A, B and C related to proportionate number of species of major taxa of invertebrates, vertebrates and plants respectively. Critically study and fill in the blanks I, II, III and IV:
(1) I - Molluscs, II - Amphibians, III - Fungi, IV - Angiosperms
(2) I - Molluscs, II - Amphibians, III - Angiosperms, IV - Fungi
(3) I - Hexapoda, II - Amphibians, III - Fungi, IV - Angiosperms
(4) I - Turtles, II - Amphibians, III - Fungi, IV - Angiosperms
Conservation hotspots are best described as:
| 1. | Areas with large numbers of endemic species that are disappearing rapidly |
| 2. | Areas where people are particularly active supporters of biological diversity |
| 3. | Islands that are experiencing high rates of extinction |
| 4. | Areas where native species are being replaced with introduced species |
A keystone species is one that:
(1) Has a higher likelihood of extinction than a non keystone species
(2) Exerts a strong influence on an ecosystem
(3) Causes other species to become extinct
(4) Has a weak influence on an ecosystem
One of the following statements is incorrect with reference to biodiversity. Identify it:
1. The richest reservoirs of animal and plant life (high species richness) with few or no threatened species are called 'biodiversity hotspots’
2. Biodiversity increases from higher altitudes to lower altitudes
3. Biodiversity decreases from the equator to polar regions
4. Depletion in genetic diversity of crop plants is mainly due to the introduction of better varieties with high yield, disease resistance, etc.
In situ strategies include-
A. Biosphere reserve
B. National park
Wildlife sanctuaries
D. Sacred forests / lakes
(1) A, B
(2) A, B, C
(3) B, C, D
(4) A, B, C, D
Ex situ strategies include:
A. Botanical garden
B. Zoos
C. Seed / Pollen banks
D. Gene bank and tissue culture
1. A, B
2. A, B, C
3. B, C, D
4. A, B, C, D
According to the concept of species area relations:
| 1. | The number of species in an area increases with the size of the area |
| 2. | Larger species require larger habitat areas than do smaller species |
| 3. | Most species within any given area are endemic |
| 4. | The larger the area, the greater the extinction rate |
The exotic species, introduced in India for its flower and leaf is:
(1) Lantana
(2) Water Hyacinth (Eicchornia)
(3) Parthenium
(4) All are correct
Column-I Column-II
I. Silent valley A. Kaziranga
II. Rhinoceros B. Bandipur
III. Tiger project in Karnataka C. In situ
IV. National Park D. Tropical evergreen forest
(1) I - B, II - A, III - D, IV - C
(2) I - D, II - A, III - B, IV - C
(3) I - A, II - C, III - B, IV - D
(4) I - B, II - A, III - C, IV - D
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