A 72-year-old man had surgery to remove an abdominal tumor. Pathohistologic studies reveal that the tumor mass contains a large number of blood vessels. An increase in which of the following is the most likely stimulus for the growth of vessels in a solid tumor?

TLS Online TPP Program

#Question id: 27039

#Unit 10. Ecological Principles

Prey defenses used against predators such as changing color for camouflage is used by

TLS Online TPP Program

#Question id: 27040

#Unit 10. Ecological Principles

dN/dt= rN – sPN that represents

TLS Online TPP Program

#Question id: 27041

#Unit 10. Ecological Principles

The Birth rate of the predator population increase as the size of the______

TLS Online TPP Program

#Question id: 27042

#Unit 10. Ecological Principles

Specific number of predators will keep the prey population at zero growth, represents

TLS Online TPP Program

#Question id: 27043

#Unit 10. Ecological Principles

Predator has carrying capacity

Following some observation are given

The number of prey, N, increase at low predator densities, P, and decrease at high predator densities

Prey zero isoclines is depends on the ratio of the growth rate of prey to the capture efficiency of the predators

 Number of predator needed for prey isoclines is depends on the ratio of the death rate of predators to the conversion efficiency of predators

Number of predator for prey isoclines depends on the ratio of the death rate of prey to the conversion efficiency of predators

Which of the above observation are true?

TLS Online TPP Program

#Question id: 27044

#Unit 10. Ecological Principles

For two species A and B in competition, the carrying capacities, competition coefficients, per capita growth rate and population size are

KA = 1000           KB = 1200    α of B= 1     β of A= .5       rB= .5         r A= .3                

AN= 500                  BN= 200

According to the Lotka-Voltera model, what is growth rate of species A?