Phenylethanolamine-N-methyltransferase catalyzes the formation of epinephrine from norepinephrine, is found in appreciable quantities only in the brain and the adrenal medulla

TLS Online TPP Program

#Id: 2360

#Unit 5. Developmental Biology

Second possible mechanisms for neoblast specification during regeneration:

Multipotent progenitor cells are positioned throughout the planarian with their lineages specified based on their position. These divide and produce postmitotic blastema cells that differentiate into their specified fates.

 

TLS Online TPP Program

#Id: 4998

#Unit 6. System Physiology – Plant

To favoring internode elongation is usually reduced leaf area and reduced branching, but at least in the short run this adaptation to canopy shade seems to work.

TLS Online TPP Program

#Id: 6434

#Unit 8. Inheritance Biology

TLS Online TPP Program

#Id: 10198

#Unit 6. System Physiology – Plant

The ribotide and riboside forms of trans-zeatin can be interconverted, and free transzeatin can be formed from the ribotide by the LONELY GUY (LOG) family of cytokinin nucleoside 5’ monophosphate phosphohydrolase enzymes

TLS Online TPP Program

#Id: 7762

#Unit 1. Molecules and their Interaction Relevant to Biology

In a covalent bond, electrons are shared between atoms. In an ionic bond, electrons are transferred between atoms.