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TLS Online TPP Program

#Question id: 8927

Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that

#SCPH05 I Biotechnology
  1. arthropods have had more time to co-evolve with land plants than have vertebrates.
  2. extant terrestrial arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates.
  3. ancestral arthropods must have been poorly adapted to aquatic life, thus experienced a selective pressure to invade land.
  4. vertebrates evolved from arthropods.
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TLS Online TPP Program

#Question id: 2668

#SCPH05 I Biotechnology

The toxic shock syndrome toxin is produced by some Salmonella species when there is not sufficient iron present. When iron is present, it prevents transcription of the TSS-toxin gene. Iron therefore serves as __________.
TLS Online TPP Program

#Question id: 5530

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

 The cavity inside the blastula is called the
TLS Online TPP Program

#Question id: 1720

#SCPH05 I Biotechnology

Which of the following statements is TRUE of lymphocytes?
TLS Online TPP Program

#Question id: 1677

#SCPH01 Biochemistry

The Ly49A receptor on NK cells does NOT:
TLS Online TPP Program

#Question id: 14117

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

Identify the character based method used for the construction of a phylogenetic tree. 
P. Maximum parsimony 
Q. Neighbor joining 
R. Maximum likelihood 
S. Bootstrapping