TC cells express a(n) ________ protein co-receptor
A) CD4
B) CD8
C) IgM
D) IgG
Answer: B
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A fertilized egg is called a
A. zygote B. ovule C. oocyte D. blastocyst
A paraphyletic group contains
A. a common ancestor but not all of its descendants. B. groups of species with different common ancestors. C. a common ancestor and all of its descendants. D. a common ancestor and all of its descendants but not the most recent common ancestor. E. every species ever derived from a common ancestor.
A protein normally synthesized in fat cells; it is thought to act as a negative feedback signal normally released by fat stores to decrease appetite and increase fat metabolism
What will be an ideal response?
A cell can crawl through a tissue because of the transmembrane ______________ proteins that can bind to fibronectin outside of the cell
(a) integrin (b) collagen (c) gap junction (d) claudin