Q. No.Competitors can coexist indefinitely only by:
1. niche differentiation 2. contest competition 3. interference competition 4. scramble competition
Population size is unlikely to be limited by:
| 1. | predation | 2. | commensalism |
| 3. | competition | 4. | brood parasitism |
Rapid loss of nutrients from terrestrial ecosystems is not caused by:
| 1. | clear-cutting native forest | 2. | early seral stages |
| 3. | climax communities | 4. | low diversity |
Semelparous organisms:
1. produce young only late in life
2. produce a large batch of young and die
3. produce young over most of their life
4. produce a single offspring near the end of their reproductive potential
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
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) |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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 |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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
© 2024 GoodEd Technologies Pvt. Ltd.