The anterior end of a tapeworm is known as the:A
proglottid.
B. cnidocyte.
C. auricle.
D. protonephridia.
E. scolex.
E
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A disadvantage of using DNA or RNA sequences to identify species is that
A. it can only be used for sexually reproducing organisms. B. it cannot be used for extinct species. C. there are no rules for determining the number of sequence differences needed for a new species. D. if can be misleading because many species exhibit large variation in phenotype.
How long does it take for the primary immune response to kick in after the first exposure to an antigen?
a. 2 weeks b. 3 - 4 days c. 2 months d. 6 weeks e. 12 hours
Which of the following would not be important when evaluating measures of frequency?
A) how the population is defined B) how long the infection lasts C) factors that may be linked to cases of the disease D) prevalence rate E) incidence rate
A reciprocal translocation between two chromosomes can result in the formation of a(n) ____________________ gene
Fill in the blank(s) with correct word