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TLS Online TPP Program

#Question id: 15387

How might the results of Bernard Davis's U tube experiment have been different if each strain were only mutant for a single gene?

#Unit 8. Inheritance Biology
  1. There would be no difference.
  2. Transformation by small pieces of DNA could restore gene function.
  3. Conjugation would not be required to change the phenotype of the bacterial strains.
  4. B AND C
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TLS Online TPP Program

#Question id: 5556

#Unit 5. Developmental Biology

Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief ________.
TLS Online TPP Program

#Question id: 5557

#Unit 5. Developmental Biology

The plasma membrane of the sea urchin egg ________.
TLS Online TPP Program

#Question id: 5559

#Unit 5. Developmental Biology

During fertilization, the acrosomal contents ________.
TLS Online TPP Program

#Question id: 5560

#Unit 5. Developmental Biology

In a newly fertilized egg, the vitelline layer ________.
TLS Online TPP Program

#Question id: 5561

#Unit 5. Developmental Biology

In sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are ________.
TLS Online TPP Program

#Question id: 5562

#Unit 5. Developmental Biology

In an egg cell treated with a chemical that binds calcium and magnesium ions, the ________.