A totipotent stem cell can generate all cell types of both embryonic and extraembryonic lineages. 

TLS Online TPP Program

#Id: 3643

#Unit 3. Fundamental Processes

The Class II synthetases lack the foregoing sequences but have three other sequences in common.

TLS Online TPP Program

#Id: 5565

#Unit 7. System Physiology – Animal

A countercurrent system is a system in which the inflow runs parallel to, counter to, and in close proximity to the outflow for some distance. This occurs for both the loops of Henle and the vasa recta in the renal medulla

TLS Online TPP Program

#Id: 3175

#Unit 3. Fundamental Processes

Each set of ter sites allows a replication fork into the termination region, but does not allow it out the other side.For example, replication fork 1 can pass through terC and terB into the region, but it cannot continue past terE, -D, and -A. This arrangement creates a "replication fork trap."

TLS Online TPP Program

#Id: 3154

#Unit 7. System Physiology – Animal

Vital capacity = Inspiratory reserve volume + tidal volume + expiratory reserve volume

TLS Online TPP Program

#Id: 4892

#Unit 13. Methods in Biology

Correlation and Regression Differences