Natural selection in an animal population results in narrowing of the range of phenotypic variation but no change in the average phenotype. What kind of selection is this population experiencing?

TLS Online TPP Program

#Question id: 10723

#Section 1: Ecology

What does the graph tell you about the effect of a keystone species?

TLS Online TPP Program

#Question id: 10725

#Section 1: Ecology

While studying the diversity of 3 communities, 5 species and 50 individuals were recorded from each community. The number of individuals under each species was listed as mentioned in the following Table.  

Which of the following is decreasing order of evenness of community?

TLS Online TPP Program

#Question id: 12348

#Section 1: Ecology

The following equation represents a hypothetical relationship between fitness (w) and shoot: root ratio (r) in individuals of a plant species: w = 10r-10r2. At what value of shoot: root ratio (r), do these plants achieve maximum fitness? (Use decimal notation, not fractions or percentage)

TLS Online TPP Program

#Question id: 12347

#Section 1: Ecology

A team of conservation biologists, surveying a population of frogs on an island, captured and marked 312 individuals in the first sample. In a second sampling, 3 days later, the team caught 140 individuals of which 26 were previously marked. The total number of frogs on the island is estimated to be . (Use decimal notation, not fractions or percentage)

TLS Online TPP Program

#Question id: 12346

#Section 1: Ecology

The schematic below shows the relationship between survivorship with age (relative to maximum lifespan) in Species 1 (dashed line) and Species 2 (solid line). Which of the following inferences is compatible with this figure?

TLS Online TPP Program

#Question id: 12344

#Section 1: Ecology

The concept of punctuated equilibrium refers to