Which one of the following is an appropriate example of sexual deceit?

Related Formula

where N = population density at time t$N = \text{population density at time } t$, r = intrinsic rate of natural increase$r = \text{intrinsic rate of natural increase}$, K = carrying capacity$K = \text{carrying capacity}$.

Core Logic

Verhulst-Pearl logistic growth models population growth in a resource-limited environment. The differential equation is given by (dN)/(dt) = rN ( (K - N)/(K) )$\frac{dN}{dt} = rN \left( \frac{K - N}{K} \right)$, where (K - N)/(K)$\frac{K - N}{K}$ represents environmental resistance.

Step 1: Conclusion

Option (1) correctly represents the logistic growth equation.

Pattern Recognition

Sees: "Verhulst-Pearl logistic growth equation". Shortcut: (dN)/(dt) = rN((K - N)/(K))$\frac{dN}{dt} = rN\left(\frac{K - N}{K}\right)$.

Chapter Mix

Class 12 Biology: Organisms and Populations

Related Formula

aligned Mutualism &arrow (+, +) Parasitism &arrow (+, -) Commensalism &arrow (+, 0) Amensalism &arrow (-, 0) aligned$\begin{aligned} \text{Mutualism} &\rightarrow (+, +)\\ \text{Parasitism} &\rightarrow (+, -)\\ \text{Commensalism} &\rightarrow (+, 0)\\ \text{Amensalism} &\rightarrow (-, 0) \end{aligned}$

Core Logic

Evaluating statements on species interactions:

• A (Incorrect): In commensalism, one species benefits and the other is unaffected (not harmed).
• B (Correct): In mutualism, both species benefit (+, +).
• C (Incorrect): In commensalism, only one species benefits (+, 0).
• D (Correct): In parasitism, parasite benefits and host is harmed (+, -).
• E (Correct): In amensalism, one species is harmed and the other is unaffected (-, 0).

Step 1: Visual Interaction Table

Statements B, D, and E are correct.

Pattern Recognition

Sees: "Mutualism (+,+), Parasitism (+,-), Amensalism (-,0)". Shortcut: Correct statements are B, D, and E.

Chapter Mix

Class 12 Biology: Organisms and Populations