The process of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration is referred as:
1. Association
2. Emigration
3. Competition
4. Immigration
Which of the following is the correct equation of exponential growth?
1. \(N_t = N_0 ~e^{rnt}\)
2. \(N_t = N_0 ~e^{rpt}\)
3. \(N_t = N_0 ~e^{rst}\)
4. \(N_t = N_0 ~e^{rt}\)
A population with finite resources shows a logistic growth curve where the correct sequence of events will be:
1. | Stationary phase → Acceleration phase → Lag phase → Asymptote |
2. | Acceleration phase → Deceleration → Asymptote |
3. | Acceleration phase → Leg phase → Stationary phase |
4. | Lag phase → Acceleration phase → Deceleration → Asymptote |
While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (–) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one species and (–) for another species involved in the interaction?
1. Competition
2. Predation
3. Amensalism
4. Commensalism
1. | It is necessitated by nature to maintain the ecological balance . |
2. | It helps in maintaining species diversity in a community. |
3. | It might lead to the extinction of a species. |
4. | Both the interacting species are negatively impacted. |
List I (Interaction) |
List II (Species A and B) |
||
A. | Mutualism | I. | +(A), O(B) |
B. | Commensalism | II. | –(A), O(B) |
C. | Amensalism | III. | +(A), –(B) |
D. | Parasitism | IV | +(A), +(B) |
Options: | A | B | C | D |
1. | III | I | IV | II |
2. | IV | II | I | II |
3. | IV | I | II | III |
4. | IV | III | I | II |
Statement I: | Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually. |
Statement II: | In general, carnivores are more adversely affected by competition than herbivores. |
List I (Interacting species) | List II (Name of Interaction) | ||
A. | A Leopard and a Lion in a Forest/grassland | I. | Competition |
B. | A Cuckoo laying an egg in a Crow's nest | II. | Brood parasitism |
C. | Fungi and root of a higher plant mycorrhizae | I. | Mutualism |
D. | A cattle egret and a Cattle in a field | IV. | Commensalism |
Options: | A | B | C | D |
1. | II | III | I | IV |
2. | I | II | III | IV |
3. | I | II | IV | III |
4. | III | IV | I | II |