The maximum concentration of antibody from the
secondary immune response occurs between weeks
a. 2 and 3.
b. 3 and 4.
c. 4 and 5.
d. 6 and 7.
e. 9 and 10.
Answer: d
You might also like to view...
The red spot on the beak of a herring gull is a sign stimulus
Indicate whether the statement is true or false.
The photosynthetic pigments of Heliobacterium and Heliophilum ________.
A. are in separate membrane structures that are not attached to the plasma membrane B. are in the plasma membrane and not in separate structures C. are in separate structures and also in the plasma membrane D. are in separate membrane structures attached to the plasma membrane
Choose the two primary factors that contribute to the resting membrane potential of a neuron.
_____ K+ leak channels make the cell membrane more permeable to K+. _____ The sodium-potassium pump exports 3 K+ from the cell for every 2 Na+ it imports _____ Na+ leak channels make the cell membrane more permeable to Na+. _____ K+ leak channels cause a higher concentration of K+ outside the cell. _____ The sodium-potassium pump exports 3 Na+ from the cell for every 2 K+ it imports
In poultry, the genes for rose comb (R) and pea comb (P) produce walnut whenever they occur
together (R__ P__); single-combed individuals have the homozygous condition for both genes (rr pp). (a) Give the F1 and F2 phenotypic results of a cross of a pure-breeding rose comb (RR pp) with a pure-breeding pea comb (rr PP). (b) Give the phenotypic results of a cross of Rr Pp ? rr Pp. (c) Give the phenotypic results of a cross of RR Pp ? rr Pp. (d) Give the phenotypic results of a cross of Rr pp ? rr Pp. (e) Give the phenotypic results of a cross of Rr Pp ? rr pp. What will be an ideal response?