PIN1 mediates vertical transport of IAA from the shoot to the root along the embryonic apical–basal axis and creates an auxin sink that drives basipetal auxin transport upward from the root apex via PIN2 efflux carriers.

TLS Online TPP Program

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#Unit 10. Ecological Principles

Human populations can exist at equilibrium densities in one of two ways:

1. High birth and high death rates

2. Low birth and low death rate

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#Unit 2. Cellular Organization

Autophagy (“eating oneself”)

When cells are placed under stressful conditions, they have the capacity to recycle macromolecules for use as nutrients in a process of lysosomal degradation.

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#Unit 4. Cell Communication and Cell Signaling

Short-term regulation: 

JAK2 deactivation by SHP1 phosphatase

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#Id: 6498

#Unit 3. Fundamental Processes

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#Unit 11. Evolution and Behavior

Selection coefficient

A related variable is the selection coefficient (s), which is the relative intensity of selection against a  genotype