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TLS Online TPP Program

#Id: 9054

The activated β2-adrenergic receptor induces GDP-->GTP exchange on a stimulatory G protein (Gs).

#Unit 4. Cell Communication and Cell Signaling #G Protein–Coupled Receptors #Part B Pointers
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TLS Online TPP Program

#Id: 5350

#Unit 10. Ecological Principles
TLS Online TPP Program

#Id: 5351

#Unit 10. Ecological Principles

λ represents the finite rate of population change over some time interval, often a year
λ = N1/N0
TLS Online TPP Program

#Id: 5353

#Unit 10. Ecological Principles

Populations grow when R0 or λ>1, populations decline when R0 or λ<1, and are at equilibrium when R0 or λ=1
TLS Online TPP Program

#Id: 5368

#Unit 10. Ecological Principles

The simplest method to measure population density is to visually count the number of organisms in a population in a given habitat.
TLS Online TPP Program

#Id: 5369

#Unit 10. Ecological Principles

Quadrats - A square frame often, but not always, measuring 50 × 50 cm. 
TLS Online TPP Program

#Id: 5371

#Unit 10. Ecological Principles

Pitfall traps set into the ground catch wandering species such as beetles and spiders. These have rain covers to prevent the animals from drowning