In the old days, milkmaids were exposed to cowpox from milking the cows, and this fortuitously gave them some protection from smallpox. What was happening in the milkmaids?
A. They were receiving a dose of generic IgG from the sick cows.
B. They were effectively receiving a vaccination from a related virus.
C. They were heightening their overall immune response due to exposure to the cowpox and other cow parasites.
D. They had a stronger immune response from drinking the milk, which sent cow B cells circulating through their blood.
B. They were effectively receiving a vaccination from a related virus.
You might also like to view...
Individuals with one sickle cell allele and one normal hemoglobin allele are not affected by the malaria parasite
because of ____.
a. neutral mutations b. heterozygote advantage c. frequency-dependent selection d. disruptive selection e. stabilizing selection
Life is defined in this text to be a process that extracts energy from the surroundings, maintains itself, and modifies the surroundings to promote its own survival
a. True b. False Indicate whether the statement is true or false
Why are some proteins synthesized after single-codon mutations still semi-functional?
a. Proteins are transported to the nucleus to be compared to and corrected by the cell’s DNA. b. Degeneracy ensures that all single-codon substitution specify the same amino acids. c. Substituted amino acids may have similar properties as the originally specified amino acids. d. Only the average properties of every amino acid in a protein determine its functionality.
At the end of which phase are the chromosomes condensed?
a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase.