Q. No.The relation between species richness and area for a wide variety of taxa on alogarithmic scale is a:
1. rectangular hyperbola 2. straight line 3. sigmoid curve 4. circular circle
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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Biodiversity loss is now one of the world’s most pressing crisis. The primary reason for this is that:
| 1. | we cannot do anything about it |
| 2. | we are not responsible for this loss |
| 3. | we still do not know its entire extent |
| 4. | it is only affecting the developing countries |
Between community, diversity is known as:
| 1. | alpha diversity | 2. | beta diversity |
| 3. | gamma diversity | 4. | delta diversity |
Rice grown in Asia is protected from four main diseases by gene received from a single wild rice species that is:
1. Oryza nivara
2. Oryza indica
3. Oryza sativa
4. Oryza orientalis
Which of the following is a source of an antimalarial drug?
| 1. | Papaver somniferum | 2. | Cinchona officinalis |
| 3. | Artemesia species | 4. | Both 2 and 3 |
The bark of the yew tree, Taxus brevifolia, is source of:
1. an antileprosy drug
2. an anticancer drug
3. a broad spectrum antibiotic
4. an analgesic and sedative
A plant, that has invaded many forest lands in India and is also known as Spanish Flag or Red sage, is:
| 1. | Lantana camara | 2. | Eicchornia |
| 3. | Parthenium argentatum | 4. | Argemone mexicana |
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Which of the following characteristics does not make a species vulnerable to extinction?
1. a large body size
2. small population size and low reproductive rates
3. feeding at a lower trophic level in the food chain
4. fixed migratory route and habitat
Why is woodland caribou prone to extinction?
1. It has a low reproductive rate
2. It has fixed migratory route and habitat
3. It is localised and has a narrow range of distribution
4. It has a large body size
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