Sequential changes in community structure over physical distance, primarily influenced by time, constitute a chronosequence

TLS Online TPP Program

#Id: 5063

#Unit 3. Fundamental Processes

Replication in bacteria and in eukaryotes is licensed and permitted to occur only once per cell cycle. Each replicon is allowed to fire only once.

TLS Online TPP Program

#Id: 3024

#Unit 3. Fundamental Processes

 DnaB is the helicase that unwinds DNA for replication in E.coli.

TLS Online TPP Program

#Id: 10463

#Unit 4. Cell Communication and Cell Signaling

MYC-MAX dimers regulate genes that control proliferation, such as cyclins.

TLS Online TPP Program

#Id: 5620

#Unit 7. System Physiology – Animal

The sensory nerves from mechanoreceptors are large myelinated Aα and Aβ fibers whose conduction velocities range from ∼70–120 & ∼40–75 m/s, respectively.

TLS Online TPP Program

#Id: 664

#Unit 3. Fundamental Processes

The meiotic telomere cluster is visualized by telomere fluorescent in situ hybridization (FISH). Microscopic image of a maize nucleus fixed at meiotic prophase (zygotene stage), subjected to telomere (green) and centromere (white) FISH, and counterstained for total DNA with DAPI (red).