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TLS Online TPP Program

#Question id: 1739

Cross-linking of B-cell surface receptors:

#XL - Q Biochemistry

  1. Is a characteristic feature of thymus-dependent antigens

  2. Lowers the intracellular Ca2+ concentration

  3. Rapidly phosphorylates the Ig-α and Ig-β chains of the surface Ig receptor

  4. Requires contiguity of two B-cell epitopes of different specificity on the same antigen molecule

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TLS Online TPP Program

#Question id: 8890

#XL - T Zoology

The larvae of many common tapeworm species that infect humans are usually found
TLS Online TPP Program

#Question id: 8892

#XL - T Zoology

Which of the following correctly characterizes the phylum Rotifera?
TLS Online TPP Program

#Question id: 8892

#XL - R Botany

Which of the following correctly characterizes the phylum Rotifera?
TLS Online TPP Program

#Question id: 8894

#XL - T Zoology

Which of the following is a shared characteristic of all chordates?
TLS Online TPP Program

#Question id: 8895

#XL - T Zoology

What is one characteristic that separates chordates from all other animals?
TLS Online TPP Program

#Question id: 8896

#XL - T Zoology

Chordate pharyngeal slits appear to have functioned first as