Q. No.The sum of the environmental factors that tend to restrict the biotic potential of an organism is called environmental resistance. In the logistic growth equation dN/dt = rN[K-N/K], the environmental resistance is represented by:
1. r 2. N 3. K 4. [K-N]/K
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Consider the two statements:
| I: | Predators in nature are ‘prudent’. |
| II: | Prey species have evolved defenses to lessen the impact of predation. |
| 1. | Both I and II are correct and II explains I. |
| 2. | Both I and II are correct but II does not explain I. |
| 3. | Only I is correct. |
| 4. | Both I and II are incorrect. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Populations and species of larger size are found in colder environments, while populations and species of smaller size are found in warmer regions. This is:
| 1. | Allen’s rule | 2. | Hesse’s rule |
| 3. | Allee effect | 4. | Bergman’s rule |
Ultimately the size of a population in a given area is determined by:
| 1. | the biotic potential |
| 2. | mortality rates and natality rates |
| 3. | carrying capacity of its environment |
| 4. | rate of immigration and emigration |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Consider the given two statements:
| I: | Parasitoidism is the strategy that is closer to predation than parasitism. |
| II: | Parasitoids feed on a living host which they eventually kill, typically before it can produce offspring |
| 1. | Both I and II are correct and II explains I. |
| 2. | Both I and II are correct but II does not explain I. |
| 3. | I is correct and II is incorrect. |
| 4. | Both I and II are incorrect. |
Resource partitioning is:
| 1. | Competitive exclusion results in the success of the superior species. |
| 2. | Slight variations in niches allow similar species to coexist. |
| 3. | Two species can coevolve to share the same niche. |
| 4. | Differential resource utilization results in a decrease in species diversity |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Identify the incorrect statement regarding population interactions:
| 1. | An orchid growing as an epiphyte on a mango branch is an example of commensalism. |
| 2. | A given fig species can only be pollinated by its partner wasp. |
| 3. | Biological pest control methods are largely based on predation. |
| 4. | Most parasites do not harm or reduce the fitness of their hosts. |
Which one of the following organisms reproduces sexually only once in its lifetime?
| 1. | Banana | 2. | Mango |
| 3. | Tomato | 4. | Eucalyptus |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
In 2005, for each of the 14 million people present in a country, 0.028 were born and 0.008 died during the year. Using the exponential equation, the number of people present in 2015 is predicted as:
| 1. | 25 million | 2. | 17 million |
| 3. | 20 million | 4. | 18 million |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
A protozoan reproduces by binary fission. What will be the number of protozoans in its population after six generations?
| 1. | 128 | 2. | 24 |
| 3. | 64 | 4. | 32 |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
© 2024 GoodEd Technologies Pvt. Ltd.