TLS Online TPP Program

#Question id: 1121


Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?

#SCPH28 | Zoology
  1. Cell-signaling pathways are seen in "primitive" cells such as bacteria and yeast.

  2. Bacteria and yeast cells signal each other in a process called quorum sensing.

  3. Signal transduction molecules identified in distantly related organisms are similar.

  4. Most signals in all types of cells are received by cell surface receptors.

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TLS Online TPP Program

#Question id: 8293

#SCPH05 I Biotechnology

The importance of computers and of computer software to modern systematics s is most closely linked to advances in ________.

TLS Online TPP Program

#Question id: 8293

#SCPH06 I Botany

The importance of computers and of computer software to modern systematics s is most closely linked to advances in ________.

TLS Online TPP Program

#Question id: 8293

#SCPH28 | Zoology

The importance of computers and of computer software to modern systematics s is most closely linked to advances in ________.

TLS Online TPP Program

#Question id: 8294

#I Life Science/ Life Sciences Group – I-V

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: 8294

#SCPH05 I Biotechnology

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: 8294

#SCPH06 I Botany

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 ________.