TLS Online TPP Program

#Question id: 11145


Two fundamental concepts about the ion channels of a "resting" neuron are that the channels ________.

#7. System Physiology – Animal
  1. are always open, but the concentration gradients of ions frequently change
  2. are always closed, but ions move closer to the channels during excitation
  3. are open or closed depending on their type, and are specific as to which ion can traverse them
  4. open in response to stimuli, and then close simultaneously, in unison
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TLS Online TPP Program

#Question id: 11912

#10. Ecological Principles

The success of birds introduced to Tahiti or the Hawaiian Islands was dependent on the morphology of the species already present. If there was a small morphological difference in bill length between the resident and introduced species, then

TLS Online TPP Program

#Question id: 11913

#10. Ecological Principles

During the rate of succession several factors would be observe at the pioneer as well as climax community;

STAGESCHARACTER
A) Pioneer communityi) Biotic Potential low
B) Climax communityii) Root to Shoot ratio is high
iii) Productivity per biomass is low
iv) Net primary productivity is high
v) P/R ratio is greater than 1
vi) Nutrient cycling is closed
vii) Regeneration ability is more
viii) Resistance ability is more

Match the community stages with its given characters;

TLS Online TPP Program

#Question id: 11914

#10. Ecological Principles

Alder trees, which harbour nitrogen-fixing bacteria in their roots, provide nitrogen to soils developing on sandbars rivers, this is an example of,

TLS Online TPP Program

#Question id: 11915

#10. Ecological Principles

Which of the following is the correct prediction about the three types of model such as; Facilitation, Inhibition, Tolerance model.

TLS Online TPP Program

#Question id: 11916

#10. Ecological Principles

Which one of the following  features of an later community?

TLS Online TPP Program

#Question id: 11917

#10. Ecological Principles

Which one of the following  features of an early community?