What type of cell is responsible for fighting parasitic worm infections?
a. B cells
b. mast cells
c. eosinophils
d. basophils
c. eosinophils
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When yeast cells of the "a" mating type are exposed to a solution of "? pheromones
A) those yeast cells will undergo cell division B) actin filaments will form a cleavage furrow in the yeast cells C) the yeast cells will fuse with each other D) G proteins will be activated in the cell signaling pathway and the yeast cells will change shape E) those yeast cells will undergo DNA replication
DNA and RNA are alike in that they _____________.
A. both have same pentose sugar B. use the same nitrogenous bases to assemble the genetic code C. have the same number of strands D. both contain nucleotides E. are both made in the cytoplasm
Visual accommodation involves adjustment to the shape of the _____
a. conjunctiva c. orbit b. retina d. lens
"Ontogeny recapitulates phylogeny" is a statement describing:
A. ultimate causes of the developmental changes in organism B. proximate causes of the developmental changes in organism