GATE Ecology and Evolution Practice Quiz

Question 1

In a closed population following logistic growth, the per capita growth rate is observed to be $0.6$ per year when the population size is $200$, and $0.2$ per year when the population size is $600$. Assuming $\frac{1}{N}\frac{dN}{dt}=r\left(1-\frac{N}{K}\right)$, what is the carrying capacity $K$?

Accepted Answer

$800$

Question 2

In a diploid population at Hardy-Weinberg equilibrium, a recessive phenotype occurs at frequency $0.09$. What is the expected frequency of heterozygotes?

Accepted Answer

$0.42$

Question 3

Which one of the following best describes Batesian mimicry?

Accepted Answer

A harmless species resembles a harmful or unpalatable species to gain protection from predators.

Question 4

A researcher estimates the Simpson concentration index of a community as $D=\sum_i p_i^2=0.25$, where $p_i$ is the relative abundance of species $i$. What is the inverse Simpson diversity?

Accepted Answer

$4$

Question 5

In a simple metapopulation model, the fraction of occupied habitat patches $p$ changes as $\frac{dp}{dt}=cp(1-p)-ep$, where $c$ is colonization rate and $e$ is extinction rate. If $c=0.5$ and $e=0.2$, the non-zero equilibrium fraction of occupied patches is:

Accepted Answer

$0.6$

Practice Quizzes

GATE Ecology and Evolution Practice Quiz