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TLS Online TPP Program

#Question id: 11122

Phylogenetic hypotheses (such as those represented by phylogenetic trees) are strongest when

#XL - S Microbiology
  1. they are based on amino acid sequences from homologous proteins, as long as the genes that code for such proteins contain no introns.
  2. each clade is defined by a single derived character.
  3. they are supported by more than one kind of evidence, such as when fossil evidence corroborates molecular evidence.
  4. they are accepted by the foremost authorities in the field, especially if they have won Nobel Prizes.
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TLS Online TPP Program

#Question id: 11586

#XL - T Zoology

Predict the effects of a drug that increases adrenocorticotropic hormone (ACTH) synthesis.
TLS Online TPP Program

#Question id: 8929

#XL - R Botany

An obsolete taxon, the ʺRadiata,ʺ included all phyla whose adults had true radial symmetry. Today, the ʺRadiataʺ is more correctly considered to be
1. a clade.
2. a grade.
3. monophyletic.
4. paraphyletic.
5. polyphyletic.
TLS Online TPP Program

#Question id: 403

#XL - S Microbiology

For the reaction A -> B, DG'° = –60 kJ/mol.  The reaction is started with 10 mmol of A; no B is initially present.  After 24 hours, analysis reveals the presence of 2 mmol of B, 8 mmol of A. Which is the most likely explanation?
TLS Online TPP Program

#Question id: 18487

#XL - R Botany

Which of the following is not a plant disease?
TLS Online TPP Program

#Question id: 1605

#XL - S Microbiology

inhibition of class I presentation,