The behavior of parental care exhibited by dinosaurs is thought to be __________ to this behavior in crocodiles and birds because phylogeny shows that these three groups share a common ancestor.
Fill in the blank(s) with the appropriate word(s).
homologous
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What is the molecular mechanism for imprinting a gene?
A. Acetylation B. Nitration C. Phosphorylation D. Methylation
The complement system serves to:
a. increase blood flow to the area of infec-tion and can also effectively wall off the infection through the production of barrier substances. b. attract and enhance the activities of pha-gocytes. c. provide substances secreted by one type of cell, which have substantial effects on the antiinfective activities of other cells. d. ingest and destroy microorganisms.
Having a mutation in some mitochondrial chromosomes but not others is called
A) heterogamy. B) heteroplasmy. C) heterogeneity. D) heterozygosity.
All of the following are coliforms that cause opportunistic and nosocomial infections except
A. Enterobacter. B. Citrobacter. C. Shigella. D. Klebsiella. E. Serratia.