Epiphytes growing on mango is an example of which type of the given population interaction? 1. Competition 2. Protocooperation 3. Commensalism 4. Mutualism

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
88%
From NCERT
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Barnacles growing on the back a whale, a type of population interaction, is an example of

1. Competition

2. Mutualism

3. Amensalism

4. Commensalism

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
89%
From NCERT
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Find the correct mathematical expression for geometric growth resulting in a J-shaped population growth curve.

1. $\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}$

2. $\frac{\mathrm{K}-\mathrm{N}}{\mathrm{K}}$

3. $\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}\left(\frac{\mathrm{K}-\mathrm{N}}{\mathrm{K}}\right)$

4. $\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}\left(\frac{\mathrm{N}-\mathrm{K}}{\mathrm{N}}\right)$

Subtopic:  Population: Exponential Growth Model |
69%
From NCERT
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Biocontrol of crop pests is often based on which of the following interspecific interactions ?

1. Competition

2. Amensalism

3. Predation

4. Commensalism

Subtopic:  Population Interactions: Predation |
73%
From NCERT
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ln the given figure, identify Coniferous forest, Arctic and Alpine Tundra and tropical forest, respectively:-

1. l, Vl and lll

2. V, Vl and lll

3. lV, lll and l

4. l, ll and lll

Subtopic:  Introduction to Ecology |
86%
From NCERT
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Ecology explains us:-

 1 How organisms, while remaining as an individual interact with other organisms 2 How organisms, interact with physical habitats as a group 3 As a group how organisms behave like organised wholes that is population community, ecosystem or even as the whole biosphere 4 All of these
Subtopic:  Introduction to Ecology |
91%
From NCERT
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Regional and local variations within each biome lead to the formation of a wide variety of:-

1. Niche

2. Population

3. Microclimate

4. Habitat

Subtopic:  Introduction to the Chapter |
61%
From NCERT
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Natural selection operates at the level of :-

1. Organism

2. Population

3. Community

4. Ecosystem

Subtopic:  Introduction to Ecology | Population Attributes |
65%
From NCERT
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Verhulst-Pearl population growth is described by the equation

1. $\frac{dN}{dt}$ = rN

2. Nt = N0ert

3. Nt = N0+B+l-D-E

4. $\frac{dN}{dt}$ = rN$\left(\frac{K-N}{K}\right)$

Subtopic:  Population: Logistic Growth Model |
87%
From NCERT
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What is true for individuals of same species?
1. Live in same niche
2. Live in same habitat
3. Interbreeding
4. Live in different habitat

Subtopic:  Population Dynamic |
67%
From NCERT