Q. No.
The consequences of high population density of a population will include all except:
1. toxic waste accumulation
2. an increase in mortality
3. ignorance of overabundant prey by the predators
4. a reduction in reproduction
1. toxic waste accumulation
2. an increase in mortality
3. ignorance of overabundant prey by the predators
4. a reduction in reproduction
Study the four statements (a-d) given below and select the two correct ones out of them:
| (a) | A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers |
| (b) | Predator starfish pisaster helps in maintaining species diversity of some invertebrates |
| (c) | Predators ultimately lead to the extinction of prey species |
| (d) | Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders |
The two correct statements are:
| 1. | (c) and (d) | 2. | (a) and (d) |
| 3. | (a) and (b) | 4. | (b) and (c) |
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The endosymbiosis between early eukaryotes and the prokaryote lineage would be an example of:
| 1. | Commensalism | 2. | Mutualism |
| 3. | Parasitism | 4. | Competition |
Consider the following statements (A)-(D) each with one or two blanks.
| A. | Bears go into __(i)__ during winter to __(ii)__ cold weather |
| B. | A conical age pyramid with a broad base represents __(iii)__ human population |
| C. | A wasp pollinating a fig flower is an example of __(iv)___ |
| D. | An area with high levels of species richness is known as __(v)___ |
| 1. | (ii) - Stable (iv) Commensalism, (v) Marsh |
| 2. | (i) - Aestivation, (v) - Escape, (iii) - Stable, (iv) - Mutualism |
| 3. | (iii) - Expanding, (iv) - Commensalism, (v) Biodiversity park |
| 4. | (i)- Hibernation, (ii) - Escape, (iii) - Expanding, (v) Hot spot |
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Which one is a correct matching of plant, its habitat and the forest type where it normally occurs
1. Prosopis –Tree–shrub
2. Saccharum–grass–forest
3. Shorea robusta–Herb–tropical rain forest
4. Acacia catechu–tree–coniferous forest
Desert lizards are able to keep their body temperature fairly constant by:
1. Physiological means
2. Anatomical means
3. Biochemical means
4. Behavioral means
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Which of the following links ecology to population genetics and evolution?
| 1. | Organismic ecology | 2. | Population ecology |
| 3. | Ecosystem ecology | 4. | Biome ecology |
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Under a particular set of selection pressures, organisms evolve towards the most efficient:
| 1. | Thermoregulation | 2. | Water conservation |
| 3. | Respiration | 4. | Reproduction strategy |
The invasive prickly pear cactus in Australia was brought under control with the help of:
| 1. | Snail | 2. | Moth |
| 3. | Ladybug | 4. | Fungus |
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