Select one of the options below and compare and contrast the paired terms:A
primary and secondary immune response
B. passive and active immunity
C. artificial and natural immunity What will be an ideal response?
A. The primary immune response is elicited upon first exposure to antigen. The secondary immune
response is elicited by secondary exposure to antigen. The secondary response is faster and greater
than the primary response. These observations are the basis of the significance of vaccination.
B. Passive immunity results from antibodies or specific immune cells delivered to a host from a
donor, e.g., from mother to fetus. Active immunity is when an individual exposed to antigen develops
antibodies and/or specific immune cells reactive with that antigen
C. Artificial immunity is induced by deliberate vaccination with a specific antigen. Natural immunity
is induced when a pathogen enters the body by natural encounters, such as a sneeze.
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The salinity of seawater at the poles is:
a. high due to evaporation. b. low due to precipitation. c. high due to freezing. d. low due to river input. e. similar to the open ocean.
In sweet peas, genes C and P are necessary for colored flowers. In the absence of either (__ pp or cc
__) or both (cc pp), the flowers are white. Give the probable genotype of a plant with colored flowers and a plant with white flowers that produced 38 plants with colored flowers and 42 plants with white flowers. What will be an ideal response?
In the cross Cc ยด Cc, gametes have a ____ chance of receiving either allele
a. 25-75 b. 50-50 c. 75-25 d. 60-40 e. 90-10
Homologous traits:
a. are shared by two or more species because some evolutionary process (usually natural selec-tion) has independently fashioned the similar traits in each species. b. are found in two or more species because those traits are from a common ancestor. c. Both of the above d. Neither of the above