The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed three-chambered hearts (two atria, one ventricle). Birds and mammals, however, are alike in having four-chambered hearts (two atria, two ventricles). The fourchambered hearts of birds and mammals are best described as ________.

TLS Online TPP Program

#Question id: 3880

#SCPH28 | Zoology

Which one of the following properties of the L-19 IVS ribozyme is not shared with enzymes that are purely protein?

TLS Online TPP Program

#Question id: 3465

#SCPH06 I Botany

One species lives only in tree holes; another species lives only in streams.

TLS Online TPP Program

#Question id: 15143

#SCPH05 I Biotechnology

Which one of the following is a depiction of the GenBank sequence entry format?

TLS Online TPP Program

#Question id: 693

#SCPH05 I Biotechnology

In an alpha helix, the R groups on the amino acid residues:

TLS Online TPP Program

#Question id: 19616

#SCPH05 I Biotechnology

Which of the following is the right temperature coefficient (n) expression?