If the planarian is cut in half, the anterior portion of the lower half regenerates a head while the posterior of the upper half regenerates a tail. 

TLS Online TPP Program

#Id: 924

#Unit 13. Methods in Biology

Normal cells treated with sodium chromate allowed to absorb and induced to death signals as T-CTLs Death of the target cells is indicated by the release of 51Cr into the supernatant

TLS Online TPP Program

#Id: 7008

#Unit 5. Developmental Biology

 Multipotent adult stem cells play major roles in organisms with high regenerative capabilities, such as hydra, axolotl, and zebrafish.

TLS Online TPP Program

#Id: 3706

#Unit 2. Cellular Organization

When a genome contains a cluster of genes with related sequences, mispairing between nonallelic loci can cause unequal crossing over. This produces a deletion in one recombinant chromosome and a corresponding duplication in the other.

TLS Online TPP Program

#Id: 10297

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 7854

#Unit 1. Molecules and their Interaction Relevant to Biology

The optical activity of a stereoisomer is expressed quantitatively by its optical rotation.

The number of degrees by which plane-polarized light is rotated on passage through a given path length of a solution of the compound at a given concentration.