Suppose you attend a town meeting at which some experts tell the audience that they have performed a cost-benefit analysis of a proposed transit system that would probably reduce overall air pollution and fossil fuel consumption. The analysis, however, reveals that ticket prices will not cover the cost of operating the system when fuel, wages, and equipment are taken into account. As a biologist, you know that if ecosystem services had been included in the analysis, the experts might have arrived at a different answer. Why are ecosystem services rarely included in economic analyses?

#Question id: 10658

#Section 2: Evolution

The accompanying figure shows population growth pattern for two species in the same habitat

Which of the following conclusions hold true?

#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?

#Question id: 10660

#Section 2: Evolution

Given below are growth equations where dN/dt is defined as

A.  rN

B. rN[(K-N)/N]

With reference to the above equations, which one of the following statements is incorrect?

#Question id: 10661

#Section 2: Evolution

Semelparous species are those that produce all of their offspring in a single reproductive event. The survivorship curve of a population of a semelparous species would most likely resemble which of the following? 

#Question id: 10662

#Section 2: Evolution

Growth model of logistic with 1000 carrying capacity and exponential with ideal condition is related to initial population. (Value of rmax = .25)

A) In Logistic growth value of X should be maximum at 1000

B) In Exponetial growth value of X should be maximum at 1000

C) In Logistic growth value of X should be maximum at 500

D) In Exponential growth value of X should be constant over size of population

#Question id: 10663

#Section 2: Evolution

Following is a hypothetical life table of species

Following some statement is given

A- This type of life table is characteristic of species that produce a large number of offspring

B- Its greatest mortality early in life, with relatively low rates of death for those surviving this bottleneck

C. It is characterized by high age-specific survival probability in early and middle life, followed by a rapid decline in survival in later life

D. This includes k selected species

Which of the following above statement is correct?