Which of the following best describes resource partitioning?
1. competitive exclusion that results in the success of the superior species
2. slight variations in niche that allow similar species to coexist
3. two species that can coevolve to share identical niches
4. differential resource utilization that results in a decrease in community species diversity
1. competitive exclusion that results in the success of the superior species
2. slight variations in niche that allow similar species to coexist
3. two species that can coevolve to share identical niches
4. differential resource utilization that results in a decrease in community species diversity
Subtopic: Population Interactions: Competition |
55%
From NCERT
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Exponential growth of a population is represented by dN/dt =
1. \(\frac{r N}{K}\)
2. rN
3. rN (K+N)
4. \(r N \frac{(K-N)}{K}\)
1. \(\frac{r N}{K}\)
2. rN
3. rN (K+N)
4. \(r N \frac{(K-N)}{K}\)
Subtopic: Population: Exponential Growth Model |
75%
From NCERT
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Which of the following is an important difference between an endotherm and ectotherm of similar body size
1. only the ectotherm uses behavioral thermoregulation
2. only the ectotherm can constrict and dilate the blood vessels to the skin to alter heat flow
3. only the endotherm can have a fever.
4. at a body temperature of 37ºC, the ectotherm has a lower metabolic rate than the endotherm
1. only the ectotherm uses behavioral thermoregulation
2. only the ectotherm can constrict and dilate the blood vessels to the skin to alter heat flow
3. only the endotherm can have a fever.
4. at a body temperature of 37ºC, the ectotherm has a lower metabolic rate than the endotherm
57%
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Introduced species can have deleterious effects on biological communities by
1. preying on native species
2. competing with native species for food or light
3. displacing native species
4. All of the options are correct
1. preying on native species
2. competing with native species for food or light
3. displacing native species
4. All of the options are correct
Subtopic: Population Interactions: Competition |
88%
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Logistic growth of a population is represented by dN/dt =
1. \(\frac{r N}{K}\)
2. rN
3. \(r N(K+N)\)
4. \(r N \frac{(K-N)}{K}\)
1. \(\frac{r N}{K}\)
2. rN
3. \(r N(K+N)\)
4. \(r N \frac{(K-N)}{K}\)
Subtopic: Population Dynamic | Population: Logistic Growth Model |
87%
From NCERT
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Given below are two statements:
| Assertion (A): | All the mammals are endotherm. |
| Reason (R): | Mammals possess four chambered heart and respire through lungs |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Study of Aves & Mammals |
75%
From NCERT
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Which of the following are important biotic factors that can affect the structure and organization of biological communities?
1. precipitation, wind
2. nutrient availability, soil pH
3. predation, competition
4. temperature, water
1. precipitation, wind
2. nutrient availability, soil pH
3. predation, competition
4. temperature, water
Subtopic: Population Interactions: Competition | Population Interactions: Predation |
71%
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Which statement best describes the evolutionary significance of mutualism?
1. Mutualism offers more biodiversity to a community.
2. Individuals taking Part in a mutualistic relationship are more resistant to parasites.
3. Interaction increases the survival and reproductive rates of mutualistic species.
4. Mutualistic interaction lessens competition in communities where it is present
1. Mutualism offers more biodiversity to a community.
2. Individuals taking Part in a mutualistic relationship are more resistant to parasites.
3. Interaction increases the survival and reproductive rates of mutualistic species.
4. Mutualistic interaction lessens competition in communities where it is present
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
65%
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To withstand the extreme dehydration many invertebrates enter a state known as anhydrobiosis. Which of the following compatible osmolytes accumulate to relatively high levels and protect the organisms against desiccation damage?
1. Ketoses
2. Trehalose
3. Raffinose
4. Stachyose
1. Ketoses
2. Trehalose
3. Raffinose
4. Stachyose
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Competition for light, nutrients and space is most severe between
1. Closely related organisms growing in the same niche
2. Closely related organisms growing in the different niche
3. Distantly related organism growing in the same habitat
4. Distantly related organisms growing in the different niches
1. Closely related organisms growing in the same niche
2. Closely related organisms growing in the different niche
3. Distantly related organism growing in the same habitat
4. Distantly related organisms growing in the different niches
Subtopic: Introduction to Ecology |
77%
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