Q. No.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
Why are blue whale and whooping crane 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
A taxon is considered “critically endangered” if it faces a high risk of extinction in the wild in:
| 1. | immediate future | 2. | near future |
| 3. | medium-term future | 4. | distant future |
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