Hans Driesch’s pressure-plate experiment implies that cell interaction is critical for normal development.

TLS Online TPP Program

#Id: 2443

#Unit 3. Fundamental Processes

The need for rho factor in vitro is variable. Some (rho-dependent) terminators require relatively high concentrations of rho, whereas others function just as well at lower levels. 

TLS Online TPP Program

#Id: 2652

#Unit 7. System Physiology – Animal

The ascending limb, both the thin & the thick segments

is virtually impermeable to water, a characteristic that is important for concentrating the urine.

TLS Online TPP Program

#Id: 6874

#Unit 3. Fundamental Processes

Heterochromatin and RNAi are required to establish the human CenH3 homolog, CENP-A, at centromeres.

TLS Online TPP Program

#Id: 5973

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 1280

#Unit 7. System Physiology – Animal

Conn syndrome (primary hyperaldosteronism) caused by an aldosterone-secreting tumor.