According to the fossil record, which of the following were the first vertebrates to appear on land?
A. reptiles
B. mammals
C. fish
D. birds
E. amphibians
E. amphibians
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The most common agent(s) causing subacute bacterial endocarditis is/are
A. Streptococcus pyogenes. B. Pseudomonas aeruginosa. C. normal skin or mouth microbiota. D. Escherichia coli.
Which of the following structures help the egg reach the fallopian tubes during ovulation?
a. Corpus luteum b. Fimbrae c. Endometrium d. Oviducts
Rickets is caused by
a. overexposure to UV radiation. b. an excess of calcitonin. c. inadequate amounts of vitamin D. d. an excess of ascorbic acid. e. a fetal deficiency of thyroid hormone.
Which of the following bacterial genera is useful for sewage treatment?
A) Burkholderia B) Thiobacillus C) Neisseria D) Zoogloea E) Nitrosomonas