What cells are responsible for cell-mediated immunological memory in which the immune response is expedited upon subsequent exposure to an antigen?
What will be an ideal response?
memory T cells
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Mussels attach themselves to substrate with: a. muscular foot
b. byssal threads. c. keratin. d. calcareous plates.
Type 1 diabetes ____
a. is characterized by normal insulin levels b. is characterized by cells that do not respond to insulin c. is the more common form of diabetes d. is usually controlled with a strict diet e. usually occurs in early childhood
In a dihybrid cross exhibiting complete genetic linkage, what would you expect?
A) one parental allele combination occurring more frequently than another B) two equally frequent gametes containing only parental allele combinations C) only recombinant gametes D) one parental allele combination occurring more frequently than another and no recombinant gametes E) two equally frequent gametes containing only parental allele combinations and no recombinant gametes
The good genes model predicts that the evolution of female preference for a male trait can never result in detrimental effects for the female
How can this prediction be reconciled with sexually selected male traits that are detri-mental to females (e.g., Drosophila male accessory gland proteins)? a. It cannot be reconciled, and the good genes model is invalid. b. Costs to females are never real and are always compensated by an overall gain in fitness. c. Intrasexual selection among males leads to traits that are detrimental to females. d. Detrimental effects to females are balanced by equally detrimental effects in males. e. C and D.