The responses observed in type IV hypersensitivities result from the action of
A. IgE antibodies and mast cells.
B. T cells and phagocytes.
C. IgG and complement.
D. autoantibodies.
E. inflammatory chemicals.
Answer: B
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Spiny bristles used for locomotion that emanate from the segments of annelids are called:
a. pharynx. b. parapodia. c. epitokes. d. setae. e. prostomia.
Sugar is translocated in phloem from a source, or an area of ____, to a sink, or an area of ____
a. low sugar concentration; high sugar concentration b. high sugar concentration; low sugar concentration c. positive water potential; negative water potential d. negative water potential; positive water potential e. low pressure; equally low pressure
Describe the chemical properties of phospholipids that account for their behavior in water
What will be an ideal response?
Proteins used to digest DNA at specific sequence regions are:
a) Protein Kinases b) Phospholipases c) Restriction Enzymes d) RNA Replicases