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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