The cell stage that occurs immediately after (A) is the __________
a. zygote
b. mitosis
c. morula
d. meiosis
A
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Plant cells typically achieve cytokinesis by:
A. binary fission. B. forming a cell plate across the middle of the cell. C. forming a cleavage furrow that pinches the cell into two. D. chromosome condensation. E. chromosome elongation.
A gribble:
a. is the substrate required for kelp to grow on. b. is a snail that crawls along kelp stipes. c. is a group of lobsters. d. is a crustacean that burrows into kelp holdfasts. e. is an echinoderm that consumes kelp.
Li-Fraumeni syndrome is a rare inherited disease that greatly increases a person's risk of developing several types of cancer. This disease stems from a mutation in the TP53 tumor suppressor gene (Nichols et al. 2001
Cancer Epidemiol Biomarkers Prev 10:83-87). In most cases, approximately 95% of the mutations can be detected by sequence analysis of exons 4 through 9. If you isolated and analyzed DNA from a Li-Fraumeni patient, what genotype should you find in DNA isolated from a. normal tissue? b. malignant tissue?
Koch's postulates are an example of
A) retrospective epidemiology B) descriptive epidemiology C) prospective epidemiology D) experimental epidemiology