Barnacles growing on the back a whale, a type of population interaction, is an example of

1. Competition

2. Mutualism

3. Amensalism

4. Commensalism

Epiphytes growing on mango is an example of which type of the given population interaction?

1. Competition

2. Protocooperation

3. Commensalism

4. Mutualism

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

Biocontrol of crop pests is often based on which of the following interspecific interactions ? 

1. Competition

2. Amensalism

3. Predation

4. Commensalism

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

Ecology explains us:-

Regional and local variations within each biome lead to the formation of a wide variety of:-

1. Niche

2. Population

3. Microclimate

4. Habitat

Natural selection operates at the level of :-

1. Organism

2. Population

3. Community

4. Ecosystem

Verhulst-Pearl population growth is described by the equation

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

2. N_t = N₀e^rt

3. N_t = N₀+B+l-D-E

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

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