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 __________.

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#Question id: 12149

#Unit 10. Ecological Principles

In a discrete-time population model, which of the following behaviours is associated when 1 < r < 2? 

TLS Online TPP Program

#Question id: 15301

#Unit 5. Developmental Biology

Initially, the morula does not have an internal cavity. However, during a process, cavitation, the trophoblast cells secrete fluid into the morula to create a blastocoel, these 

membranes of trophoblast cells contain_______?

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#Question id: 4126

#Unit 3. Fundamental Processes

Which one of the following is true about the genetic code?

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#Question id: 844

#Unit 1. Molecules and their Interaction Relevant to Biology

It is a given set of conditions that are required  for the maintenance of the active set of cellular proteins

TLS Online TPP Program

#Question id: 11917

#Unit 10. Ecological Principles

Which one of the following  features of an early community?