Fibrin formation involves a cascade of enzymatic reactions and a series of numbered clotting factors.

TLS Online TPP Program

#Id: 1688

#Unit 4. Cell Communication and Cell Signaling

VpreB and λ5 (called a surrogate light chain), to form a pre-B-cell receptor.

TLS Online TPP Program

#Id: 1903

#Unit 4. Cell Communication and Cell Signaling

Stages in hematopoiesis

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#Id: 5859

#Unit 10. Ecological Principles

Larger populations are more resistant to extinctions.  Greater ranges of habitats promote increased speciation rates.

TLS Online TPP Program

#Id: 2343

#Unit 3. Fundamental Processes

Promoters with sequences closer to the consensus are generally “stronger” than those that match less well

TLS Online TPP Program

#Id: 7192

#Unit 5. Developmental Biology

Antigen pieces are held within the binding groove of a cell surface protein called the major histocompatibility complex (MHC) molecule which recognized by T cell