Sigma neoblasts are highly proliferative and are the only stem cells directly responsive to injury.

TLS Online TPP Program

#Id: 9722

#Unit 6. System Physiology – Plant

Thorns are modified branches, as in citrus and acacia; spines

are modified leaves

Prickles are derived mainly from the epidermis and thus can be easily snapped off the stem, protect plants from larger herbivores

Trichomes, or hairs, provide a much more effective defense against insect pests

TLS Online TPP Program

#Id: 9806

#Unit 6. System Physiology – Plant

Pr chromophore undergoes a cis–trans isomerization between carbons 15 and 16 and rotation of the C14-C15 single bond on red light exposure.

TLS Online TPP Program

#Id: 1367

#Unit 4. Cell Communication and Cell Signaling

All STAT proteins contain: 

An N-terminal DNA-binding domain

An SH2 domain

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#Id: 6355

#Unit 8. Inheritance Biology

Homoplasmy - All mutated mitochondria

Heteroplasmy - wild type + mutant mitochondria

TLS Online TPP Program

#Id: 9675

#Unit 4. Cell Communication and Cell Signaling

PDK1 can phosphorylate PKB on a critical threonine residue in its activation loop