TLS Online TPP Program

#Question id: 4992


The existence of the phenomenon of exaptation is most closely associated with which of the following reasons that natural selection cannot fashion perfect organisms?

#Unit 11. Evolution and Behavior
  1. Natural selection and sexual selection can work at cross-purposes to each other.

  2. Evolution is limited by historical constraints.

  3. Adaptations are often compromises.

  4. Chance events affect the evolutionary history of populations in environments that can change unpredictably.

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TLS Online TPP Program

#Question id: 10966

#Unit 7. System Physiology – Animal

A couple requests blood typing of their 2-year-old child (father AB, Rh-negative; mother B, Rhnegative). Results of hemagglutination assays of the child’s blood are shown in the next figure. Which of the following conclusions concerning the child’s parentage is valid?


TLS Online TPP Program

#Question id: 10967

#Unit 7. System Physiology – Animal

A 21-year-old female, blood type B, is undergoing surgery. Her platelet count is 75,000/μl. She will need platelet infusions before and during surgery. Which of the following blood types would be used to collect platelets that are compatible with the patient?

TLS Online TPP Program

#Question id: 10968

#Unit 7. System Physiology – Animal

Which of the following is TRUE concerning erythroblastosis fetalis (hemolytic disease of the newborn, HDN)?

TLS Online TPP Program

#Question id: 10969

#Unit 7. System Physiology – Animal

Which of the following will result in a transfusion reaction? Assume that the patient has never had a transfusion.

TLS Online TPP Program

#Question id: 10970

#Unit 1. Molecules and their Interaction Relevant to Biology

A mother of blood type A+ who has always been perfectly healthy just delivered her second child. The father is of blood group O−. Knowing that the child is of blood group O− (O, Rh−), what would you expect to find in this child?

TLS Online TPP Program

#Question id: 10970

#Unit 7. System Physiology – Animal

A mother of blood type A+ who has always been perfectly healthy just delivered her second child. The father is of blood group O−. Knowing that the child is of blood group O− (O, Rh−), what would you expect to find in this child?