Which of the following organs of cephalopods resemble those of the vertebrates?
A. arms
B. nephridia
C. eyes
D. digestive tissues
E. foot
C. eyes
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Fungal spores and animal dander are considered to be which type of allergen?
A. Contactant B. Injectant C. Ingestant D. Inhalant
Which of the following are classified as pyrimidines?
A) adenine and thymine B) guanine and cytosine C) adenine and guanine D) thymine and cytosine E) adenine and uracil
GgTt pea plants can produce __________ type(s) of gamete(s), but a ggtt plant can produce __________ type(s) of gamete(s).
A. four ... one B. two ... one C. one ... two D. four ... two
Is the following statement true or false? "Vertebrates can never get ahead in the evolutionary race against their microbial pathogens."
a. True, vertebrate mutation rates are not high enough. b. True, vertebrate population sizes are too small. c. False, "real" evolution occurs only at the population level. d. False, the population size of immune system cells in an individual host can be similar to that of microbial pathogens.