The most effective biologic control of insects is achieved by:
1. | insectivorous birds | 2. | biocides |
3. | parasitoid wasps | 4. | parasitic nematodes |
An endangered species as compared to a threatened species:
1. is nearer to extinction
2. threatens the survival of other species
3. is one about which the known data is deficient
4. has more diversity
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The type of species that will most likely be supported by small parks will be:
1. | k - selected species | 2. | r - selected species |
3. | climax species | 4. | species with small niches |
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 best preservation areas are:
1. small in size but multiple in number
2. large ones are better than small-sized ones
3. the size is less important than the number
4. size and number are irrelevant