Which of the following statements about the evolution of life histories is correct?

A) Unstable environments with unlimited resources favor r-selected populations.

B) K-selected populations are most often found in environments where density-independent factors are important regulators of population size.

C) Most populations have both r- and K-selected characteristics that vary under different environmental conditions.

D) The reproductive efforts of r-selected populations are directed at producing just a few offspring with good competitive abilities.

TLS Online TPP Program

#Question id: 12314

#Section 1: Ecology

Optimal foraging involves all of the following except

TLS Online TPP Program

#Question id: 10684

#Section 2: Evolution

Which one of the following statements is INCORRECT?

TLS Online TPP Program

#Question id: 10720

#Section 1: Ecology

What is the Jaccard index between the two communities?

TLS Online TPP Program

#Question id: 11177

#Section 2: Evolution

Intraspecific competition can result in individuals migrating from

TLS Online TPP Program

#Question id: 10659

#Section 2: Evolution

Ecological and crude density of fish prey in related with predator. Water level is drop during the dry season and further increases in a rainy season. Following some observation effect are present on their density

 A) Ecological density is not change with respect to water level       

 B) Ecological density is gradually decrease with low water level

 C) Crude density increases over ecological density during low water level             

 D) Ecological density increases while crude density decreases during low water level

 E) There is no effect on crude density with seasonal water level

 Which of the following above observation is correct?